How can I check the maintenance fee payment status of a patent?

There are two primary methods to check the maintenance fee payment status of a patent:

1. Online: Visit the USPTO’s Maintenance Fee webpage. Enter the patent number and corresponding application number in the appropriate fields.
2. By Phone: Call the USPTO’s Maintenance Fee Branch. Note that telephone status requests are limited to two patent numbers per call.

As stated in the MPEP: “Maintenance fee status information for a patent of interest can be obtained over the internet by entering the patent number and the corresponding application number in the appropriate spaces on the webpage available at https://fees.uspto.gov/MaintenanceFees.”

To learn more:

• maintenance fees
• patent status
• USPTO
• online verification
• telephone verification