| Class 250 | RADIANT ENERGY |
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![[List of Pre Grant Publications for class 250 subclass 250]](../as.gif) | ![[List of Patents for class 250 subclass 250]](../ps.gif) | 250 | RADIO AND MICROWAVE ABSORPTION WAVEMETERS |
| | 251 | ELECTRICALLY NEUTRAL MOLECULAR OR ATOMIC BEAM DEVICES AND METHODS |
| | 252.1 | CALIBRATION OR STANDARDIZATION METHODS |
| | 253 | GEOLOGICAL TESTING OR IRRADIATION |
| | 254 |  With drill or drilling |
| | 255 | With sampling |
| | 256 | Well testing apparatus and methods |
| | 257 |  With casing collar detection |
| | 258 | By interface of fluids |
| | 259 | With placement of tracer in or about well |
| | 261 | With detector or detector circuit control |
| | 262 | With particular detector signal circuit |
| | 267 | With radiation control to detector |
| | 268 | With well-engaging means |
| | 269.1 | With source and detector |
| | 269.2 |  With plural types of detectors |
| | 269.3 | Having gamma source and gamma detector |
| | 269.4 | Having neutron source and neutron detector |
| | 269.6 | Having neutron source and gamma detector |
| | 265 | Plural detectors |
| | 271 | CODED RECORD AND READERS; INVISIBLE RADIANT ENERGY TYPE |
| | 281 | IONIC SEPARATION OR ANALYSIS |
| | 282 | Methods |
| | 285 | With plural, simultaneous ion generators |
| | 286 | Ion beam pulsing means with detector synchronizing means |
| | 288 | With sample supply means |
| | 289 | With evacuation or sealing means |
| | 290 | Cyclically varying ion selecting field means |
| | 294 | Static field-type ion path-bending selecting means |
| | 301 | METHODS OF DETERMINING OIL PRESENCE, CONTAMINATION OR CONCENTRATION |
| | 302 | RADIATION TRACER METHODS |
| | 304 | METHODS INCLUDING SEPARATION OR NONRADIANT TREATMENT OF TEST MATERIALS |
| | 305 | ELECTRON ENERGY ANALYSIS |
| | 306 | INSPECTION OF SOLIDS OR LIQUIDS BY CHARGED PARTICLES |
| | 307 | Methods |
| | 308 | Including a radioactive source |
| | 309 | Positive ion probe or microscope type |
| | 310 | Electron probe type |
| | 311 | Electron microscope type |
| | 440.11 | Analyte supports |
| | 315.3 | SOURCE WITH CHARGED PLATE-TYPE DETECTOR |
| | 316.1 | WITH INFRARED OR THERMAL PATTERN RECORDING |
| | 324 | CORONA IRRADIATION |
| | 580 | SOURCE WITH RECORDING DETECTOR |
| | 581 | Using a stimulable phosphor |
| | 591 | Including a light beam read-out |
| | 328 | AUTOMATIC/SERIAL DETECTION OF SIMILAR SOURCES |
| | 329 | RECORD PROJECTORS |
| | 330 | INFRARED-TO-VISIBLE IMAGING |
| | 331 | Including liquid crystal detector |
| | 332 | Including detector array |
| | 333 | Including image tube-type detector |
| | 334 | Including means for scanning field of view |
| | 335 | CLOUD OR BUBBLE CHAMBERS |
| | 336.1 | INVISIBLE RADIANT ENERGY RESPONSIVE ELECTRIC SIGNALLING |
| | 336.2 | Superconducting type |
| | 337 | With heating of luminophors |
| | 338.1 | Infrared responsive |
| | 338.2 | Ferroelectric, ferromagnetic, photomagnetic types |
| | 338.3 | Pyroelectric type |
| | 338.4 | Semiconducting type |
| | 338.5 | With means to analyze uncontained fluent material |
| | 339.01 | With selection of plural discrete wavelengths or bands |
| | 339.02 | Including detector array |
| | 339.03 | Including temperature control means |
| | 339.04 | Including temperature determining means |
| | 339.05 | With additional noninfrared wavelengths |
| | 339.06 | With radiation source |
| | 339.07 |  Including spectrometer or spectrophotometer |
| | 339.09 | With calibration steps in measurement process |
| | 339.1 | Determining moisture content |
| | 339.11 | Measuring infrared radiation reflected from sample |
| | 339.12 | Using sample absorption for chemical composition analysis |
| | 339.14 | Detecting infrared emissive objects |
| | 340 | Methods |
| | 341.1 | With irradiation or heating of object or material |
| | 341.2 | Including probe |
| | 341.3 | Including polarizing means |
| | 341.4 | With semiconductor sample |
| | 341.5 | With calibration |
| | 341.6 | Heating of object or material |
| | 341.7 | With multiple sources |
| | 341.8 | Measuring infrared radiation reflected from sample |
| | 342 | Locating infrared emissive objects |
| | 343 | With means to transmission-test contained fluent material |
| | 347 | With movable beam deflector or focussing means |
| | 349 | Plural signalling means |
| | 351 | With periodic beam varying means |
| | 352 | With temperature modifying means |
| | 353 | With beam deflector or focussing means |
| | 354.1 | Signalling means controls incident radiation |
| | 356.1 | Flow metering |
| | 357.1 | Fluent material level signalling |
| | 358.1 | With means to inspect passive solid objects |
| | 361R | With or including a luminophor |
| | 362 | Methods |
| | 363.01 | With radiant energy source |
| | 363.02 | Body scanner or camera |
| | 363.03 | With positron source |
| | 363.04 | Emission tomography |
| | 363.06 | Using coded aperture |
| | 363.07 | With distortion correction |
| | 363.08 | With detector support |
| | 363.09 | With calibration |
| | 363.1 | With a collimator |
| | 364 | With fluent source handling or collecting means |
| | 365 | Ultraviolet light source |
| | 366 | Plural electric signalling means |
| | 367 | Plural or composite luminophor |
| | 368 | With optics |
| | 369 | With output system |
| | 361C | Chemiluminescent detection |
| | 370.01 | Semiconductor system |
| | 370.02 | Alpha particle detection system |
| | 370.03 | Fission fragment/fissionable isotope detection system |
| | 370.04 | Self-powered system |
| | 370.05 | Neutron detection system |
| | 370.06 | Discrimination-type system |
| | 370.07 | Dose or dose rate measurement |
| | 370.08 | Imaging system |
| | 370.1 | Position sensitive detection system |
| | 370.11 | Scintillation system |
| | 370.12 | Of material other than germanium, diamond, or silicon |
| | 370.14 | Particular detection structure (e.g., MOS, PIN) |
| | 370.15 | Temperature control or compensation system |
| | 371 | Methods |
| | 372 | Ultraviolet light responsive means |
| | 374 | Including a radiant energy responsive gas discharge device |
| | 375 | Methods |
| | 376 | With electroscopic indicators |
| | 379 | With means to supply the gas |
| | 382 | With means to ionize the gas |
| | 385.1 | Plural chambers or three or more electrodes |
| | 386 | With a periodic electrode bias varying means |
| | 387 | With periodic electrode bias supply |
| | 388 | With indicator |
| | 389 | Including ionization means |
| | 390.01 | Neutron responsive means |
| | 390.02 | Radiographic analysis |
| | 390.03 | With dose measurement |
| | 390.04 | Composition analysis |
| | 390.06 | Density/thickness/consistency analysis |
| | 390.07 | Spectrum analysis |
| | 390.1 | Including beam control |
| | 390.11 | Including a scintillator |
| | 390.12 | Position-sensitive |
| | 391 | Methods |
| | 392 | With indicating or recording means |
| | 393 | With radiant energy source |
| | 394 | Plural signalling means |
| | 395 | Methods |
| | 200 | PHOTOCELLS; CIRCUITS AND APPARATUS |
| | 201.1 | Photocell controls its own optical systems |
| | 201.2 | Automatic focus control |
| | 201.3 | Of a microscope |
| | 201.4 | Active autofocus |
| | 201.6 | Based on triangulation |
| | 201.7 | Based on contrast |
| | 201.8 | Based on image shift |
| | 201.9 | Light beam wavefront phase adaptation |
| | 203.1 | Following a target (e.g., a star or instrument pointer or other object) other than a pattern |
| | 202 | Following a pattern (e.g., line or edge) |
| | 548 | Controlling web, strand, strip, or sheet |
| | 549 | Cathode-ray tube |
| | 204 | Adjusting optical system to balance brightness in plural paths |
| | 205 | Controlling light source intensity |
| | 550 | Interference pattern analysis (e.g., spatial filtering or holography) |
| | 551 | Signal isolator |
| | 552 | Solid state light source |
| | 554 | Flame light source |
| | 559.01 | With circuit for evaluating a web, strand, strip, or sheet |
| | 559.02 | Evaluation of photographic film |
| | 559.03 | Sequential detector arrangement |
| | 559.04 | Evaluation by regions, zones, or pixels |
| | 559.07 | With imaging |
| | 559.09 | With polarization |
| | 559.1 | With calibration |
| | 559.11 | Detection of both reflected and transmitted light |
| | 559.12 | Beam interruption or shadow |
| | 559.16 | Detection of diffuse light |
| | 559.19 | Measuring dimensions |
| | 559.2 | With comparison to reference or standard |
| | 559.21 | Volume |
| | 559.22 | Profile |
| | 559.24 | Transversal measurement (e.g., width, diameter, cross-sectional area) |
| | 559.26 | Longitudinal measurement (e.g., length or spacing) |
| | 559.27 | Thickness |
| | 559.29 | Measuring position |
| | 559.3 | With alignment detection |
| | 559.31 | With triangulation |
| | 559.32 | Measuring rate of motion or flow (change of position) |
| | 559.33 | With robotics |
| | 559.34 | Lead or wire bond inspection |
| | 559.35 | Centroid |
| | 559.36 | Edge |
| | 559.37 | Angular orientation (e.g., skew) |
| | 559.38 | Determining range from detector |
| | 559.39 | With comparison to reference or standard |
| | 559.4 | With indication of presence of material or feature |
| | 206 | Photocell controlled circuit |
| | 206.1 | Having means to generate positional information in at least one plane of a target moving relative to one or more photodetectors |
| | 206.2 | Detection of positional information in two or more planes (e.g., azimuth and elevation; hour angle and declination) |
| | 555 | Including coded record |
| | 558 | Stereoplotters |
| | 564 | With circuit for evaluating a fluent material |
| | 207 | Electron multiplier |
| | 208.1 | Plural photosensitive image detecting element arrays |
| | 208.2 | Plural photosensitive nonimage detecting elements |
| | 208.3 | With electronic scanning |
| | 208.4 | Used to switch an electrical circuit or device on or off |
| | 208.5 | With photodetector output ratioing other than by bridge or push-pull circuits |
| | 208.6 | With specific relative positional geometry of photosensitive elements (e.g., an annular photosensitive element surrounding a coaxially mounted photosensitive element) |
| | 210 | Bridge and push-pull circuits |
| | 214R | Special photocell or electron tube circuits |
| | 214P | Photographic control |
| | 214D | Light dimmers |
| | 214A | Amplifier type |
| | 214PR | Photosensitive rheostat type |
| | 214SG | Self-generating type |
| | 214.1 | Special photocell |
| | 214AG | Automatic gain control |
| | 214AL | Ambient light responsive |
| | 214B | Ambient light desensitizing means |
| | 214C | Compensation |
| | 214DC | Digital circuitry |
| | 214L | Logarithmic/linear signal |
| | 214RC | Rate of change |
| | 214SF | Slave flash |
| | 214SW | Electronic switch |
| | 215 | Combined with diverse-type device |
| | 216 | Optical or pre-photocell system |
| | 227.11 | Light conductor |
| | 227.12 | Optical delay line |
| | 227.13 | Light pen |
| | 227.14 | Condition responsive light guide (e.g., light guide is physically affected by parameter sensed which results in light conveyed to the photocell) |
| | 227.15 | With detection of macroscopic break in fiber |
| | 227.16 | With detection of fiber microbend caused by parameter affecting fiber |
| | 227.17 | Causing polarization change in fiber |
| | 227.18 | Causing light spectral frequency/wavelength change |
| | 227.19 | With coherent interferrometric light |
| | 227.2 | With imaging |
| | 227.21 | With light chopping or modulation |
| | 227.23 | With spectral frequency/wavelength discrimination |
| | 227.24 | With coupling enhancement means |
| | 227.26 | With scanning |
| | 227.27 | With coherent interferrometric light |
| | 227.28 | With specific configuration of light conductor components with respect to each other |
| | 227.29 | With specific illumination or viewing orientation of light conductor relative to viewed object (e.g., light normal to, and detector at 45 degree angle to, viewed object) |
| | 227.3 | With variable orientation of light conductor relative to viewed object (e.g., goniometer) |
| | 227.31 | Side or edge illuminated light conductor or collector |
| | 227.32 | End illuminated light conductor with noncircular geometric cross section |
| | 566 | Including coded record |
| | 573 | Fluent material in optical path |
| | 221 | Controlled by article, person, or animal |
| | 225 | Polarizing |
| | 226 | Color (e.g., filter or spectroscope) |
| | 228 | Integrating sphere |
| | 229 | Light valve (e.g., iris diaphragm) |
| | 231.1 | Actuated by dynamic external physical quantity |
| | 231.11 | Actuated by gauge element deflection |
| | 231.12 | Gyroscopes |
| | 231.13 | Shaft angle transducers |
| | 231.19 | Pressure-responsive light valves |
| | 230 | Reflection type(e.g., mirror galvanometer) |
| | 232 | Light chopper type |
| | 578.1 | Plural light sources or optical paths |
| | 234 | Means for moving optical system |
| | 237R | Hoods, grating, baffles, diaphragms, masks |
| | 238 | Temperature control of photocell |
| | 239 | Housings (in addition to cell casing) |
| | 396R | WITH CHARGED PARTICLE BEAM DEFLECTION OR FOCUSSING |
| | 423R | ION GENERATION |
| | 424 | Methods |
| | 425 | With sample vaporizing means |
| | 426 | Arc type |
| | 427 | Electron bombardment type |
| | 423P | Photoionization type |
| | 423F | Field ionization type |
| | 428 | FLUENT MATERIAL CONTAINMENT, SUPPORT OR TRANSFER MEANS |
| | 429 | With temperature control |
| | 430 | With valve or pump actuator |
| | 431 | With cleaning means |
| | 432R | With irradiating source or radiating fluent material |
| | 453.11 | SUPPORTED FOR NONSIGNALLING OBJECTS OF IRRADIATION (E.G., WITH CONVEYOR MEANS) |
| | 458.1 | LUMINOPHOR IRRADIATION |
| | 472.1 | INVISIBLE RADIATION RESPONSIVE NONELECTRIC SIGNALLING |
| | 473.1 | Methods |
| | 474.1 | Optical change type |
| | 475.2 | Photographic type |
| | 483.1 | Luminescent device |
| | 489 | ION COLLECTORS |
| | 491.1 | MEANS TO ALIGN OR POSITION AN OBJECT RELATIVE TO A SOURCE OR DETECTOR |
| | 492.1 | IRRADIATION OF OBJECTS OR MATERIAL |
| | 493.1 | RADIANT ENERGY GENERATION AND SOURCES |
| | 494.1 | Plural radiation sources |
| | 496.1 | With container for radioactive source and radiation directing or selectable shielding |
| | 497.1 | With means to move source between shielded and unshielded position |
| | 498.1 | With pivoted or rotatable radiation shield |
| | 503.1 | With radiation modifying member |
| | 505.1 | RADIATION CONTROLLING MEANS |
| | 522.1 | SOURCE SUPPORTS |
| | 526 | MISCELLANEOUS |
| CROSS-REFERENCE ART COLLECTIONS | ||
| | 900 | OPTICAL LIQUID LEVEL SENSORS |
| | 901 | With gap between light guide elements (includes open light path preset) |
| | 904 | With single light guide element to guide light in a continuous path |
| | 909 | METHODS AND APPARATUS ANCILLARY TO STIMULABLE PHOSPHOR SYSTEMS |
| | 910 | FOOD SAMPLE ANALYSIS USING INVISIBLE RADIANT ENERGY SOURCE |
| FOREIGN ART COLLECTIONS | ||
| FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
| DIGESTS | ||
| | DIG1 | PASSIVE INTRUSION DETECTORS |
| | DIG2 | RADON DETECTION |