- 501-Filing Papers With the U.S. Patent and Trademark Office
- 502-Depositing Correspondence
- 503-Application Number and Filing Receipt
- 504-Assignment of Application for Examination
- 505-Date of Receipt Stamp
- 506-Completeness of Original Application
- 507-Drawing Review in the Office of Patent Application Processing
- 508-Distribution
- 509-Payment of Fees
- 509.01-Deposit Accounts
- 509.02-Small Entity Status — Definitions
- 509.03-Claiming Small Entity Status
- 509.04-Micro Entity Status — Definitions
- 509.04(a)-Gross Income Basis for Micro Entity Status
- 509.04(b) -Institution of Higher Education Basis for Micro Entity Status
- 509.04(c) -Parties Who Can Sign the Micro Entity Certification
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- 510-U.S. Patent and Trademark Office Business Hours
- 511-Postal Service Interruptions and Emergencies
- 512-Certificate of Mailing or Transmission
- 513-Deposit as Priority Mail Express® with U.S. Postal Service