Research and Course Guides: Patent Searching, Advanced: USPTO Databases

USPTO (United States Patent and Trademark Office)

Patent Databases
Full text of all U.S. patents (keyword searchable) from 1976 to date, and published patent applications from March 2001 to date. Patents from 1790-1975 are image files, and searchable only by patent number, issue date, and current classification.

CPC Classifications
Browse or search the Cooperative Patent Classification (CPC) system

Official Gazette
Published each Tuesday in electronic form only, and contains bibliographic text and a representative drawing from each patent issued that week.

PATENTS AND SERIAL NUMBERS AVAILABLE FOR LICENSING
Notices are published in the Official Gazette
PUBLIC PAIR (Patent Application Information Retrieval)
Information regarding status for issued patents or published patent applications. The easiest way to access a published application is to input the patent application number in the Publication number field, being sure to include the suffix A1.
WITHDRAWN PATENT APPLICATION NUMBERS
This listing consists of Pre-Grant Publication (PGPub) numbers that have been withdrawn. Numbers that have been withdrawn subsequent to publication are followed by an asterisk (*)
WITHDRAWN PATENT NUMBERS
This listing consists of patent numbers that do not correspond to issued patents, which are referred to as "withdrawn patent numbers."

Manual of Patent Examining Procdure (MPEP)
Provides USPTO patent examiners, applicants, attorneys, agents, and representatives of applicants with a reference work on the practices and procedures relative to the prosecution of patent applications before the USPTO.