| Class 210 | LIQUID PURIFICATION OR SEPARATION |
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![[List of Pre Grant Publications for class 210 subclass 600]](../as.gif) | ![[List of Patents for class 210 subclass 600]](../ps.gif) | 600 | PROCESSES |
| | 601 |  Treatment by living organism |
| | 602 |  Including plant or animal of higher order |
| | 603 | Including collecting or storing gas (e.g., fuel, carbon monoxide, etc.) |
| | 605 | Anaerobically, with subsequently aerobically treating liquid |
| | 606 | Adding enzyme or releasing same by treating microorganism |
| | 607 | Dividing, treating, and recombining liquid |
| | 608 | Regulating floating constituent |
| | 609 | Including dewatering sludge |
| | 610 | Including adding ancillary growth medium for microorganism |
| | 612 | And regulating temperature during biological step |
| | 614 | Controlling process in response to stream constituent or reactant concentration |
| | 615 | Utilizing contact surfaces supporting microorganism (e.g., trickling filter, etc.) |
| | 620 | Aerobic treatment |
| | 621 |  Recirculating to prior step |
| | 622 |  Of separated liquid |
| | 623 | Of sludge or separated solid |
| | 629 | And internally circulating the liquid |
| | 630 | And anaerobic treatment |
| | 631 | And additional treating agent other than mere mechanical manipulation (e.g., chemical, sorption, etc.) |
| | 632 | Treating by enzyme |
| | 633 | Extracting utilizing solid solute |
| | 635 | Liquid/liquid or gel type (i.e., jellylike) chromatography |
| | 636 | Including cleaning or sterilizing of apparatus |
| | 637 | Including regulating pressure to control constituent gradient at membrane or to prevent rupture of membrane |
| | 638 | Including ion exchange or other chemical reaction |
| | 639 | Including prior use of additive (e.g., changing pH, etc.) |
| | 640 | Passing through membrane in vapor phase |
| | 641 | Utilizing plural diverse membranes |
| | 642 | Extracting water from brine utilizing liquid/liquid solvent or colloidal extraction |
| | 643 | Utilizing liquid membrane (e.g., emulsion) in liquid/liquid solvent or colloidal extraction |
| | 644 | Diffusing or passing through septum selective as to material of a component in liquid/liquid solvent or colloidal extraction |
| | 645 | Biological fluid (e.g., blood, urine, etc.) |
| | 648 | Including regenerating or rehabilitating the extracting liquid in liquid/liquid solvent or colloidal extraction |
| | 649 | Diffusing or passing through septum selective as to material of a component of liquid |
| | 656 | Chromatography |
| | 657 | Utilizing rotating column |
| | 658 | Utilizing paper or thin layer plate |
| | 659 | Including liquid flow diversion |
| | 660 | Ion exchange or selective sorption |
| | 661 | By passing through suspended bed |
| | 662 | And liquid testing or volume measuring |
| | 663 | Including diverse separating or treating of liquid |
| | 664 | By distilling or degassing |
| | 665 | By making an insoluble substance or accreting suspended constituents |
| | 668 | By chemically modifying or inhibiting dispersed constituent |
| | 669 | Prior to ion exchange or sorption |
| | 670 | Including rehabilitating or regenerating exchange material or sorbent |
| | 671 | Of oil sorbent material |
| | 672 | Fractional, selective, or partial type |
| | 673 | Utilizing gas, water, or chemical oxidizing or reducing agent |
| | 674 | Utilizing organic regenerant |
| | 675 | Rehabilitating or regenerating in diverse zone or chamber |
| | 677 | Using conserved or recirculated fluid |
| | 678 | Including liquid flow direction change |
| | 679 | Utilizing exchange or sorbent material associated with inert material |
| | 681 | Removing ions |
| | 682 | Radioactive |
| | 683 | Anions |
| | 687 | Calcium or magnesium (e.g., hardness, water softening, etc.) |
| | 688 | Heavy metal |
| | 689 | Sorbing water from diverse liquid |
| | 690 | Sorbing organic constituent |
| | 695 | Using magnetic force |
| | 696 | Preventing, decreasing, or delaying precipitation, coagulation or flocculation |
| | 702 | Making an insoluble substance or accreting suspended constituents |
| | 703 | Effecting flotation |
| | 708 | Including emulsion breaking |
| | 709 | Controlling process in response to stream condition |
| | 710 | Treating the insoluble substance |
| | 712 | Including recycling |
| | 714 | Seeding |
| | 716 | Including step of manufacturing inorganic treating agent |
| | 718 | Including degassing |
| | 719 | Including chemical reduction |
| | 721 | Including oxidation |
| | 723 | Utilizing precipitant, flocculant, or coagulant, each with accelerator or with each other or plural precipitants, flocculants, or coagulants |
| | 729 | Utilizing organic precipitant |
| | 737 | Including temperature change |
| | 738 | Including agitation |
| | 739 | Including controlling process in response to a sensed condition |
| | 740 | Density or specific gravity sensing |
| | 741 | Pressure sensing |
| | 742 | Temperature sensing |
| | 743 | pH sensing |
| | 744 | Level sensing |
| | 745 | Turbidity or optically sensing |
| | 746 | Electrical property sensing |
| | 747.1 | Including geographic feature |
| | 747.2 | Stormwater treatment |
| | 747.4 | Dredging sediments/water mixture from underwater beds treated |
| | 747.5 | Body of freshwater, surface flowing freshwater, or body of saltwater |
| | 747.7 | Groundwater treatment |
| | 747.9 | Utilizing artificial waste pond or pit (e.g., waste lagoon, wastewater pond, etc.) |
| | 748.01 | Utilizing electrical or wave energy directly applied to liquid or material being treated |
| | 748.02 | Sound waves |
| | 748.03 | Destroying living organisms |
| | 748.04 | Destroying/degradation of chemical contaminant |
| | 748.05 | Separating particles |
| | 748.06 | Laser |
| | 748.07 | Microwaves |
| | 748.08 | Infrared radiation |
| | 748.09 | Visible light |
| | 748.1 | Ultraviolet radiation |
| | 748.16 | Including chemical treatment |
| | 749 | Chemical treatment |
| | 750 | Including degassing |
| | 752 | Plural spaced feedings |
| | 753 | Utilizing halogen or halogen containing material |
| | 757 | By chemical reduction |
| | 758 | By oxidation |
| | 759 | Utilizing peroxy compound (e.g., hydrogen peroxide, peracid, etc.) |
| | 760 | Utilizing ozone |
| | 761 | Liquid phase high temperature and pressure (e.g., "wet air", etc.) |
| | 763 | Catalytic |
| | 764 | Destroying microorganisms |
| | 765 | Including liquid recirculation |
| | 766 | Including temperature change |
| | 767 | Separating |
| | 768 | Including treating separated solids |
| | 769 | Destroying cake or solid component |
| | 770 | Including drying (e.g., by squeezing or heating, etc.) |
| | 772 | Washing with a fluid other than the prefilt |
| | 773 | Including preliminary conversion to liquid state |
| | 774 | Including temperature change |
| | 776 | Skimming |
| | 777 | Including precoating filter medium with filter aid |
| | 779 | Discharging residue to prefilt |
| | 780 | Including movement of filter during filtration |
| | 781 | Centrifugally extracting |
| | 783 | Rotating belt |
| | 784 | Rotating drum |
| | 785 | Cleaning filter utilizing wave energy (e.g., vibrating, pulsating, etc.) |
| | 786 | Of particulate bed (e.g., fluidized or moving bed, etc.) |
| | 787 | Cyclonic, or centrifugal (e.g., whirling or helical motion or by vortex, etc.) |
| | 790 | Dividing and recombining |
| | 791 | Rehabilitating or regenerating filter medium |
| | 799 | Filtering immiscible liquids |
| | 800 | Utilizing gravitational force |
| | 801 | Including change of mainstream flow direction |
| | 803 | Including specified feature of settled solids removal |
| | 804 | And additional diverse separation |
| | 805 | And recirculating liquid |
| | 806 | Plural separating |
| | 807 | Utilizing particulate bed |
| | 808 | Including specified pressure change |
| | 85 | WITH ALARM, INDICATOR, REGISTER, RECORDER, SIGNAL OR INSPECTION MEANS |
| | 86 | Material level or thickness responsive |
| | 87 | Responsive to fluid flow |
| | 90 | Fluid pressure responsive |
| | 91 | Position or extent of motion |
| | 92 | Test valve |
| | 93 | In effluent conduit |
| | 94 | Transparent |
| | 96.1 | CONSTITUENT MIXTURE VARIATION RESPONSIVE |
| | 97 | FLOW, FLUID PRESSURE OR MATERIAL LEVEL, RESPONSIVE |
| | 98 | Fluid current controlled cyclic system |
| | 99 | Prefilt deverting to drain by prefilt accumulation |
| | 100 | Flow cut-off requiring reset |
| | 101 | Proportionate feed means |
| | 102 | Programming plural units |
| | 103 | Diverse sensing means |
| | 106 | Filter cleaning |
| | 109 | Discharge of treated material |
| | 110 | With separator inlet control |
| | 111 | Responsive to prefilt accumulation or filter clogging |
| | 112 | Heavier constituent |
| | 113 | By weight of solids |
| | 114 | By treated liquid accumulation |
| | 115 | With lighter constituent outlet control |
| | 116 | Permitted by filtrate accumulation |
| | 117 | Check valve controlled |
| | 120 | Vent control |
| | 121 | Float |
| | 130 | Fluid pressure responsive by-pass |
| | 131 | By movement of separation medium |
| | 132 | With additional separation or treating means |
| | 133 | In inlet and outlet closure header |
| | 134 | Plural elements controlled |
| | 136 | Check valve |
| | 137 | Maintaining stream pressure or flow |
| | 138 | WITH TIME CONTROL |
| | 141 | WITH PROGRAM ACTUATOR |
| | 143 | AUTOMATIC CONTROL |
| | 144 | Responsive to vibration or unbalance |
| | 145 | Responsive to rotation |
| | 148 | Container movement operated |
| | 149 | Thermal |
| | 150 | WITH GAS-LIQUID SURFACE CONTACT MEANS |
| | 153 | STRUCTURAL INSTALLATION |
| | 154 | Flume stream type |
| | 155 | Plural or diverse screens |
| | 156 | Fluid stream or residue operated |
| | 158 | With cleaner for movable strainer |
| | 159 | With cleaner and means to remove residue therefrom |
| | 160 | Endless belt strainer |
| | 161 | Revolving strainer |
| | 162 | Fixed strainer |
| | 163 | Grated inlet surface drain |
| | 167.01 | Closed circulating system |
| | 167.02 | For lubrication system |
| | 167.03 | Having magnetic treating means |
| | 167.04 | Plural separators |
| | 167.06 | With heating or cooling means |
| | 167.08 | Separator for transmission system |
| | 167.09 | With separator cleaning means |
| | 167.1 | For swimming pool or spa (e.g., skimmer, etc.) |
| | 167.11 | With means to add treating material |
| | 167.12 | Separator external to swimming pool or spa |
| | 167.15 | Separator for use on swimming pool or spa bottom and separator for use at water surface |
| | 167.16 | Separator for use on swimming pool or spa bottom |
| | 167.18 | Skimmer arm at skimmer opening at water surface |
| | 167.19 | Mesh or screen filter at or near water surface |
| | 167.21 | For aquarium |
| | 167.22 | Separator using living organism |
| | 167.23 | Separator or part thereof associated with bottom of aquarium (e.g., means positioned under gravel, etc.) |
| | 167.25 | Particulate filter or particulate sorbent |
| | 167.26 | Separator with aerator |
| | 167.27 | Separator mounted on top edge of aquarium wall |
| | 167.28 | For cooking oil system |
| | 167.29 | Having magnetic treating means |
| | 167.3 | With means to add treating material |
| | 167.31 | Plural separators |
| | 167.32 | With heating or cooling means |
| | 170.01 | Geographic |
| | 170.02 | For fishpond |
| | 170.03 | For stormwater treatment (e.g., rainwater runoff, stormsewer treatment, etc.) |
| | 170.04 | For excavating means |
| | 170.05 | Floating means |
| | 170.06 | Separator with aerator |
| | 170.07 | Groundwater |
| | 170.08 | Septic system including drain field or leach field or waste liquid treatment system |
| | 170.09 | Body of freshwater (e.g., pond, lake, reservoir, etc.) |
| | 170.1 | Surface flowing freshwater (e.g., stream, river, ditch, canal, etc.) |
| | 170.11 | Body of saltwater (e.g., sea, ocean, etc.) |
| | 171 | Machinery |
| | 172.1 | Separator ancillary to storage tank |
| | 173 | COMMINUTING |
| | 175 | WITH HEATER OR HEAT EXCHANGER |
| | 176 | Thermal diffusion |
| | 177 | With treating fluid addition |
| | 179 | With mechanical agitator or movable separator |
| | 180 | Vapor or gas removal |
| | 181 | Flow line connected in series with distinct separator |
| | 182 | Diverse separators |
| | 184 | For filter |
| | 187 | Within gravitational separator |
| | 188 | WITH GAS SEPARATOR |
| | 189 | PLURAL CHAMBERS WITH MOVEMENT OF GRANULES THEREBETWEEN |
| | 190 | WITH EXTERNAL SUPPLY MEANS FOR REGENERATING MEDIUM, E.G., WATER SOFTENING SYSTEM |
| | 192 | WITH PRELIMINARY CHEMICAL MANUFACTURE |
| | 193 | WITH PRECOAT ADDING OR APPLYING MEANS |
| | 194 | RECIRCULATION |
| | 195.1 | Serially connected distinct treating or storage units |
| | 195.2 | With semipermeable membrane, e.g., dialyzer, etc. |
| | 195.3 | With sediment recycle means directly to main stream |
| | 196 | Of filtrate |
| | 197 | From bottom of separator |
| | 198.1 | WITH MEANS TO ADD TREATING MATERIAL |
| | 198.2 | Chromatography |
| | 199 | Spaced along flow path |
| | 200 | Plural distinct separators |
| | 205 | With distinct reactor tank, trough or compartment |
| | 209 | Directly applied to separator |
| | 210 | To interior of moving filter, e.g., drum |
| | 211 | Through separator supporting rotary shaft |
| | 212 | With stationary casing closure feature |
| | 213 | With coaxial rotary impeller or distributor |
| | 214 | With stationary mount for movable distributor |
| | 215 | With effluent dividing means |
| | 216 | Moving filter medium |
| | 218 | Gas removed from closed tank |
| | 219 | With mechanical agitator |
| | 220 | Submerged fluid inlet |
| | 222 | MAGNETIC |
| | 224 | SECTIONAL CHAMBER PRESS TYPE |
| | 225 | With residue removal or liquid agitation |
| | 226 | With porous filler |
| | 227 | Medium clamped in joint |
| | 230 | With repair or assembling means |
| | 231 | Plates or frames |
| | 232 | WITH REPAIR OR ASSEMBLING MEANS |
| | 233 | Piercing or closure knock out means |
| | 234 | Removable treatment part with normally disabled flow controller |
| | 235 | Placement of container opens flow controller |
| | 236 | Sliding or rolling on guide means |
| | 237 | Hoist or handle means |
| | 239 | CONVERTIBLE |
| | 241 | WITH MOVABLE SUPPORT |
| | 243 | ELECTRICAL INSULATING OR ELECTRICITY DISCHARGING |
| | 244 | PORTABLE RECEPTACLE WITH HOOD OR CLOSURE |
| | 247 | FILTRATE SPLASH PLATE AND/OR DEFLECTOR |
| | 248 | WITH DRIP, OVERFLOW OR CONTENT DRAINING FEATURE |
| | 249 | BRACKET OR LEG SUPPORT FOR STATIC SEPARATOR ASSEMBLY |
| | 251 | COMBINED |
| | 252 | SERIALLY CONNECTED DISTINCT TREATING WITH OR WITHOUT STORAGE UNITS |
| | 253 | Parallel |
| | 254 | With by-pass |
| | 255 | Cascade |
| | 256 | One unit inside another |
| | 257.1 | With storage unit |
| | 258 | With pump, gas pressure or vacuum source |
| | 259 | Diverse |
| | 263 | PARTICULATE MATERIAL TYPE SEPARATOR, E.G., ION EXCHANGE OR SAND BED |
| | 264 | Selective units or compartments |
| | 265 | With gravitational separator |
| | 266 | With spaced non-particulate separating means |
| | 267 | Trunnion mounted casing |
| | 268 | Gravity flow of particles type |
| | 269 | With rehabilitation means |
| | 270 | Movable means for particle pickup and redeposit |
| | 271 | Surface traversing type |
| | 274 | Including means to apply gas to bed |
| | 275 | Backwash or blowback means |
| | 276 | With mechanical agitator or residue remover |
| | 277 | Flow controller external of closed casing |
| | 279 | With embedded fluid distributor |
| | 280 | With agitator |
| | 281 | With access opening to normally closed casing |
| | 282 | Removable cartridge or hand-manipulated container |
| | 283 | Pervious divider between and contacting beds |
| | 284 | Spaced beds |
| | 285 | Embedded baffle |
| | 287 | Within flow line or flow line connected closed casing |
| | 288 | Conduit through bed, inlet and outlet at same end of casing |
| | 289 | With particular liquid receiving means or foraminous bed retainer |
| | 290 | With multi-layer beds |
| | 291 | Particular liquid receiving means or foraminous bed retainer |
| | 294 | DIVERSE DISTINCT SEPARATORS |
| | 295 | Including a filter |
| | 296 | Including liquid as a separating medium |
| | 297 | Moving filter medium |
| | 298 | With mechanical residue or sediment mover |
| | 299 | Including constituent trapping feature |
| | 300 | Alternate filters and traps in series |
| | 302 | Flow-line valve upstream of separator |
| | 303 | Cut-off sediment trap |
| | 304 | Tangential flow, spiral or convolute baffle |
| | 305 | Baffle preceding or within sediment trap |
| | 307 | Downstream of filter medium |
| | 308 | Directly communicating with tubular filter interior |
| | 310 | Lateral trap |
| | 311 | Downflow inlet, upflow through filter medium |
| | 312 | Sediment discharge means |
| | 314 | Spaced filters |
| | 319 | With agitator |
| | 320 | With baffle perpendicular to flow direction |
| | 321.6 | CASING DIVIDED BY MEMBRANE INTO SECTIONS HAVING INLET(S) AND/OR OUTLET(S) |
| | 321.61 | Membrane secured with adhesive of specified composition |
| | 321.62 | Antithrombogenic membrane |
| | 321.63 | Rotating mechanical agitator adjacent membrane |
| | 321.64 | Plural diverse structured membranes within a single casing |
| | 321.65 | Permeated liquid quantity measurement or control |
| | 321.66 | Energy recovery from treated liquid |
| | 321.67 | Membrane movement during purification |
| | 321.69 | With membrane cleaning or sterlizing means (other than by filter movement or rotating agitator) |
| | 321.71 | Dialyzer with dialysate proportioning means |
| | 321.72 | Each section having inlet(s) and outlet(s) |
| | 321.73 | Noncoiled nonannular cross section tube |
| | 321.74 | Coiled membrane |
| | 321.75 | Planar membrane |
| | 321.77 | Pleated membrane |
| | 321.78 | Cylindrical membrane |
| | 321.82 | Noncoiled nonannular cross section tube |
| | 321.83 | Coiled membrane |
| | 321.84 | Planar membrane |
| | 321.86 | Pleated membrane |
| | 321.87 | Cylindrical membrane |
| | 322 | PLURAL DISTINCT SEPARATORS |
| | 323.1 | Filters |
| | 323.2 | Tubular |
| | 324 | Movable separating elements |
| | 325 | Planetary |
| | 326 | Drum type on parallel axis |
| | 327 | Plural cleaners and plural movable elements |
| | 328 | Pivotally mounted sections |
| | 329 | Relatively movable |
| | 330 | Connected for group operation |
| | 332 | With residue removal or liquid agitation |
| | 335 | In series for prefilt flow |
| | 340 | Parallel filters with flow controller |
| | 342 | One element within another |
| | 343 | Alternating oppositely opening liquid distributors |
| | 344 | Abutted alternating medium and pan type receiver |
| | 345 | Radial or radially connected to central header |
| | 346 | Spaced wall-type filters |
| | 348 | FILTER |
| | 349 | Pulsation dampener or gas trapping |
| | 350 | With movable means to compress medium |
| | 353 | Free cleaning means, e.g., loose abrading particles |
| | 354 | Medium, cleaner or agitator moved by fluid |
| | 357 | Relatively movable members interleaved for cleaning |
| | 358 | Imperforate drum, medium on arc, chord or end |
| | 359 | Movable medium |
| | 360.1 | Centrifugal extractor |
| | 360.2 | With inward flow of feed component |
| | 361 | With individual article container or support |
| | 363 | With adjustable rotation stabilizer |
| | 364 | Casing, shaft and filter unit gyratorily mounted |
| | 365 | Shaft and filter unit gyratorily mounted |
| | 367 | Filter gyratorily mounted on shaft |
| | 368 | With rotation brake |
| | 369 | Discharging residue |
| | 370 | Secondary motion of filter medium |
| | 371 | With variable flow controller |
| | 372 | By residue engaging means |
| | 377 | Internal work distributor |
| | 378 | Including filtrate receiving means having plural filtrate outlets |
| | 379 | Including filtrate receiving trough adjacent top discharge |
| | 380.1 | Rotating element construction |
| | 383 | Separate agitator |
| | 384 | Vibrator and unidirectional motion filter medium |
| | 385 | With plural motion |
| | 386 | Rolls or confining members contacting residue |
| | 387 | Unrollable |
| | 388 | Vibrating or longitudinally reciprocating |
| | 390 | Mounted on movable valve element |
| | 391 | With cleaning means |
| | 392 | Fixed position or attached valve blocking means |
| | 393 | Backwash or blowback and additional cleaner |
| | 394 | Discharging inside, e.g., internal-type drum |
| | 395 | With filter-driven valve means |
| | 396 | Solid cleaner, e.g., scraper |
| | 398 | Within sealed enclosure |
| | 400 | Belt type |
| | 402 | Drum type |
| | 405 | Movable prefilt distributor |
| | 406 | Vacuumized filtrate receiver |
| | 407 | With residue removing means or agitation of liquid |
| | 408 | Diverse, e.g., combined agitators, scrapers, aeration blowback |
| | 409 | Fluid cleaning |
| | 413 | Fixed filter medium and movable stirrer or cleaner |
| | 416.1 | With pump, gas pressure, or suction source |
| | 416.2 | For aquarium or swimming pool |
| | 416.3 | For drinking water |
| | 416.4 | For fuel system |
| | 416.5 | For lubricating or oil treating system |
| | 417 | Alternating oppositely opening liquid distributors |
| | 418 | With flow controller for material being treated |
| | 419 | Attached to or within portable prefilt receiver |
| | 420 | Selective directive flow relative to filter |
| | 421 | Pivoted prefilt deflector |
| | 422 | Plural outlets from filter casing |
| | 424 | Multi-way valve |
| | 427 | Backwash |
| | 428 | Combining or dividing flow passages with filter in combined passage |
| | 429 | Filter coaxial with valve seat or valve stem |
| | 432 | Filter in valve body recess |
| | 433.1 | Divided filtered, and unfiltered liquid passages |
| | 435 | Within flow line or flow line connected close casing |
| | 436 | Vented |
| | 437 | Central internal liquid receiver, e.g., tube |
| | 443 | Inlet and outlet at same end |
| | 445 | Clamped in casing joint |
| | 446 | Axially aligned inlet and outlet |
| | 447 | Laterally removable |
| | 448 | Single open-end-type filter element |
| | 449 | Pipe end attached closed casing, e.g., faucet |
| | 450 | Gasket within casing or spaced removable end members |
| | 451 | Internal fixed shoulder supporting filter element |
| | 453 | Filter element clamped between closure and end wall |
| | 454 | Filter element attached to closure |
| | 455 | Receptacle and modified spacing surface or support for filter medium |
| | 456 | Prefilt flow distributor or diverter |
| | 457 | With central pervious tubular receiver |
| | 459 | Pipe or plate attached type |
| | 464 | Portable receptacle draining type |
| | 465 | Cooperating handles on receptacle and drainer |
| | 466 | Receptacle spout |
| | 469 | On or adjacent receptacle upper edge |
| | 470 | Handled |
| | 472 | Vented |
| | 473 | Resting on supporting receiver, e.g., portable |
| | 474 | At upper edge of filtrate receiver |
| | 477 | Resting on internal stop or surface |
| | 478 | Unitary filter medium and radially expandable retainer |
| | 479 | Inner separate retainer |
| | 481 | Longitudinal retainer or guide, (e.g., reflex coffee maker) |
| | 482 | At lower end or prefilt receiver |
| | 483 | Supported, shaped or superimposed formed mediums |
| | 484 | Medium within foraminous supporting container or sheath |
| | 485 | External cage-type support |
| | 486 | Spaced wall type, e.g., hollow leaf |
| | 488 | Abutted or superimposed members |
| | 493.1 | Pleated |
| | 494.1 | Convolute |
| | 495 | Single ring or closed frame type |
| | 496 | Bound, fused or matted, e.g., porous shapes, sponges, etc. |
| | 497.01 | Cylindrical, conical, or trough shape |
| | 498 | Perforated or grooved plates |
| | 499 | Screens, e.g., woven |
| | 500.1 | Material |
| | 500.21 | Semipermeable membrane |
| | 500.22 | Isotropically pored |
| | 500.23 | Hollow fiber or cylinder |
| | 500.24 | Antithrombogenic coating or membrane |
| | 500.25 | Metal containing |
| | 500.26 | Glass |
| | 500.27 | Organic |
| | 501 | Sterilizing or neutralizing agent containing |
| | 502.1 | Sorptive component containing |
| | 503 | Diverse granular or fibrous |
| | 506 | Coated or impregnated, e.g., adhesively bound |
| | 510.1 | Porous unitary mass |
| | 511 | LIQUID AS SEPARATING MEDIUM |
| | 512.1 | TANGENTIAL FLOW OR CENTRIFUGAL FLUID ACTION |
| | 513 | GRAVITATIONAL SEPARATOR |
| | 514 | Portable invertible, e.g., milk and cream separator |
| | 519 | Material supply distributor |
| | 521 | Superposed compartments or baffles, e.g., parallel plate type |
| | 523 | Mechanical constituent mover |
| | 524 | Diverse serial |
| | 525 | Scum sediment removal |
| | 526 | Endless belt or chain |
| | 527 | Rectilinearly movable supporting means |
| | 528 | Horizontally rotating scraper |
| | 532.1 | Heavier constituent trap, chamber, or recess |
| | 538 | Lighter constituent trap |
| | 541 | ADJUNCTS |
| | 542 | MISCELLANEOUS |
| CROSS-REFERENCE ART COLLECTIONS | ||
| | 900 | ULTRA PURE WATER (E.G., CONDUCTIVITY WATER) |
| | 901 | SPECIFIED LAND FILL FEATURE (E.G., PREVENTION OF GROUND WATER FOULING) |
| | 902 | MATERIALS REMOVED |
| | 903 | Nitrogenous |
| | 906 | Phosphorus containing |
| | 908 | Organic |
| | 911 | Cumulative poison |
| | 915 | Fluorine containing |
| | 916 | Odor (including control or abatement) |
| | 917 | Color |
| | 918 | MISCELLANEOUS SPECIFIC TECHNIQUES |
| | 919 | Using combined systems by merging parallel diverse waste systems |
| | 920 | Using combined systems of sequential local and regional or municipal sewage systems |
| | 921 | Flow equalization or time controlled stages or cycles |
| | 922 | Oil spill cleanup (e.g., bacterial, etc.) |
| | 923 | Using mechanical means (e.g., skimmers, pump, etc.) |
| | 924 | Using physical agent (e.g., sponge, mop, etc.) |
| | 925 | Using chemical agent |
| | 926 | Using oxidation ditch (e.g., carousel, etc.) |
| | 928 | PAPER MILL WASTE (E.G., WHITE WATER, BLACK LIQUOR, ETC.) TREATED |
| | 929 | HEMOULTRAFILTRATE VOLUME MEASUREMENT OR CONTROL PROCESSES |
| | 930 | PAINT DETACKIFYING |
| | 931 | ZEBRA MUSSEL MITIGATION OR TREATMENT |
| FOREIGN ART COLLECTIONS | ||
| FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
| Any foreign patents or nonpatent literature from subclasses that have been reclassified have been transferred directly to the FOR Collection listed below. These Collections contain ONLY foreign patents or nonpatent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived. | ||
| STRUCTURAL INSTALLATION (210/153) |
| FOR100 | Closed circulating systems (210/167) |
| FOR103 | Geographic (e.g., drainage ditch, septic, pond) (210/170) |
| FOR104 | Ancillary to storage tank (210/172) |
| PROCESSES (210/600) |
| FOR105 | Utilizing electrical or wave energy (directly applied to liquid or material being treated) (210/748) |
| FOR106 | Including geographic feature (e.g., drainage ditch, septic, pond) (210/747) |
| DIGESTS | ||
| | DIG3 | BELT ALIGNMENT |
| | DIG5 | COALESCER |
| | DIG6 | DEHYDRATORS |
| | DIG7 | DRIER BLOCKS |
| | DIG8 | FAT FRYER |
| | DIG9 | FLOATING COVER |
| | DIG13 | PART FLOW-FULL FLOW |
| | DIG17 | TWIST-ON |