How are application numbers assigned by the USPTO?

The USPTO assigns application numbers to patent applications immediately after mail has been opened. According to MPEP 503, application numbers consist of a series code and a serial number. The series codes are assigned based on the type of application and the time period in which it was filed. For example: 01/ – 16/ for…

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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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