qyule最新电信一app下载安装

Maintenance fees are required to keep in force all utility and reissue utility patents based on applications filed on or after December 12, 1980. Maintenance fees are not required for a design or plant patent, or for statutory invention registrations.

Quick links:Pay maintenance fees View current fee amounts


If you need assistance, please contact theMaintenance Fee Branch at 571-272-6500 or[email protected].

Clicky