How can I check if the USPTO is officially closed on a particular day?

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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. To find out if the USPTO is officially closed on any particular day, you can: Call 1-800-PTO(786)-9199 Call (571) 272-1000 These phone numbers are provided in MPEP 510 for obtaining information about USPTO closures. Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse USPTO Considered Closed on Official Federal Holidays MPEP 510 Filing Requirement Despite USPTO Closure MPEP 510 Permitted Method to Check Office Closure MPEP 510 Permitted Maintenance fee may be paid on next business day if due on holiday MPEP 510 Permitted USPTO Not Open on Holidays and Sundays MPEP 510 Priority Mail Express Filing Requirement MPEP 510 Date Stamp for Priority Mail Express Deposits MPEP 510 Saturday Deposit Stamped with Saturday Date MPEP 510 Office Employees Must Show Building Badges to Enter Patent Search Room MPEP 510 Required Rules for Using Technology Center Facilities MPEP 510 Required Other Related FAQs 5 FAQs Collapse What are the requirements for accessing USPTO public information facilities? What are the hours for the Public Search Facility in Alexandria? How are filing deadlines affected by USPTO closures? What are the official business hours of the USPTO? Can I file patent applications on weekends or federal holidays?