Is a daytime telephone number required when submitting a patent application?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-09 10 Rules 5 Related FAQs This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice. While not strictly required, the USPTO requests the submission of a daytime telephone number for the party to whom correspondence is to be addressed. According to 37 CFR 1.33(a) : For the party to whom correspondence is to be addressed, a daytime telephone number should be supplied in a clearly identifiable manner and may be changed by any party who may change the correspondence address. The MPEP explains that although business is conducted on the written record (as per 37 CFR 1.2 ), a daytime telephone number is useful for initiating contact that could later be reduced to writing. It’s a practical way to facilitate communication between the USPTO and the applicant or their representative. Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse Contents of Patent Application Required MPEP 601 Required Fee Required for Patent Application MPEP 601 Required Inventor Must File Written Patent Application MPEP 601 Required Fee and Oath/Declaration Requirement for Patent Application MPEP 601 Required Juristic Applicant or Patent Owner Can Sign Transmittal Letter MPEP 601 Permitted Docket Number Required for Provisional Application MPEP 601 Government Agency and Contract Number Required for Inventions Developed Under Federal Contract MPEP 601 Filing Fee Required for Provisional Application MPEP 601 Required Reissued Patent Continues Original Claims MPEP 1460 Prohibited Intervening Rights for Pre-Grant Activities MPEP 1460 Prohibited Other Related FAQs 5 FAQs Collapse What are the signature requirements for papers filed in a patent application? What additional requirements are there for correcting inventorship after an Office action on the merits? How do I request copies of pate...