Is a daytime telephone number required for patent applications filed before September 16, 2012?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-10 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 recommends providing a daytime telephone number for patent applications filed before September 16, 2012. According to MPEP 403.01(b) : Pre-AIA 37 CFR 1.33(a) requests the submission of a daytime telephone number of the party to whom correspondence is to be addressed. While business is to be conducted on the written record (37 CFR 1.2), a daytime telephone number would be useful in initiating contact that could later be reduced to writing. Key points about the daytime telephone number: It is not mandatory but recommended It can be changed by any party who can change the correspondence address It facilitates initial contact that can later be documented in writing Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse Daytime Telephone Number Required for Correspondence MPEP 403.01(b) Daytime Telephone Number Requirement for Correspondence MPEP 403.01(b) Telephone Number Can Be Changed With Address Modification MPEP 403.01(b) Correspondence Customer Number Required for USPTO Access MPEP 403 Permitted Customer Number for Correspondence Address Required MPEP 403 Permitted Single Customer Number for Correspondence Address MPEP 403 Permitted Correspondence Address Required for Notification MPEP 403 Required Correspondence Address Required for Notification MPEP 403 Permitted Correspondence Address Required for Notification MPEP 403 Patent Practitioner Can Change Correspondence Address MPEP 403.01(b) Permitted Other Related FAQs 5 FAQs Collapse How does filing a 37 CFR 1.63 oath or declaration affect the correspondence address in pre-AIA applications? What happens if multiple correspondence addresses are specified in a pre-AIA patent appli...