What is an application number and how is it assigned?

An application number consists of a series code and a serial number. It is assigned by the Office of Patent Application Processing (OPAP) immediately after mail has been opened. For applications filed using the USPTO patent electronic filing system, EFS-Web provides an Acknowledgement Receipt containing a time and date stamp, application number, and confirmation number.…

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What is a confirmation number in a patent application?

A confirmation number is a four-digit number assigned to each newly filed patent application. It is used in combination with the application number to verify the accuracy of the application number on correspondence filed with the USPTO. This helps avoid misidentification due to transposition errors. The MPEP states: ‘The confirmation number is a four-digit number…

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How can I get a receipt for items filed with the USPTO?

There are two main ways to obtain a receipt for items filed with the USPTO: For paper filings: Include a self-addressed postcard with your submission, itemizing all components being filed. The USPTO will stamp the receipt date on the postcard and return it. For electronic filings via EFS-Web or Patent Center: An Electronic Acknowledgement Receipt…

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What information is included in a patent filing receipt?

A patent filing receipt includes: Application number Filing date Confirmation number Suggested class in the U.S. Patent Classification System Art unit number where the application is likely to be examined Continuing data (if applicable) National stage data (if applicable) Foreign priority data (if applicable) Foreign filing license data (if applicable) Entity status information Anticipated publication…

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What are the series codes for different types of patent applications?

The USPTO assigns different series codes to various types of patent applications: 01/ – 16/: Nonprovisional applications (utility, plant, and reissue) 29/: Design applications 35/: International design applications 60/, 61/, and 62/: Provisional applications 90/: Ex parte reexamination proceedings 95/: Inter partes reexamination proceedings 96/: Supplemental examination proceedings and resulting ex parte reexamination proceedings The…

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