Reference Desk

Patent Glossary

A short glossary of patent terms, with links to fuller guides. Find definitions for claims, prior art, prosecution, assignment, and other recurring terms.

These short definitions are reading aids. Follow the linked guides for context and sources.

Application

A request for a patent, with the required supporting material. See filing options.

Assignment

A transfer of ownership interests. Compare a license.

Claim

A statement defining the invention for which protection is sought or granted. See patent claims.

Filing Date

The date an application satisfies the applicable filing-date requirements. Priority and benefit rules can involve other dates.

Office Action

A communication from the patent office during examination, often setting out objections or rejections.

Patent Pending

An indication that an application has been filed. See patent pending.

Prior Art

Earlier material or activity relevant under patent law. See searching basics.

Prosecution

The process of pursuing an application before the patent office.

PTAB

The Patent Trial and Appeal Board. See IPR and the PTAB.

Specification

The written description of the invention, including the claims. See reading a patent.

Term

The duration of patent rights, subject to the applicable rules. See patent term.

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