Patent Terms Glossary

Serial Number

Definition:
A number assigned to a patent application when it is filed. A serial number is usually used together with a two digit series code to distinguish between applications filed at different times.

Registration Number

Definition:
A registered patent attorney/agent is assigned a registration number that they must include on patent correspondence and forms when representing others before the USPTO.

DTD

Definition:
Document type definition - a format specification file that accompanies documents prepared according to SGML (standard generalized markup language), including XML (extensible markup language).

Nonprovisional Patent Application

Definition:
An application for patent filed under 35 U.S.C. 111(a) that includes all patent applications (i.e., utility, design, plant, and reissue) except provisional applications.

Reexamination Proceeding

Definition:
At any time during the enforceability of a patent any person may file a request for the USPTO to conduct a second examination of any claim of the patent on the basis of prior art patents or printed publications.

National Stage Application

Definition:
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.

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