A 371 application is an application which has entered the national phase of the Patent Cooperation Treaty by the fulfillment of certain requirements in a national Office, which is an authority entrusted with the granting of national or regional patents. Such an application is filed under 35 U.S.C. §371 in the United States and is referred to as a "371 application."
Pay maintenance fees and learn more about filing fees and other payments
Notices of possible system outages