How do you tell the difference between a granted patent and patent application?

Generally, although every country has its own system, telling the difference between a granted patent and patent application by their number format is easy to do once you know the kind code rules and formatting for each country.  This article looks at several of the top filing countries and elucidates the numbering scheme for both the application and the granted patent.

 

StateIdentifierStatusDescription
Canada (CA)CA2525122

CA2525122 A1



CA2525122 C
APPLICATION

PUBLISHED



GRANTED
No kind code.

Same number to application number
A1 - laid open (i.e. made available for public viewing but not yet granted).

C - granted patent.
European Patent (EP)EP04732551 A1


EP04732551 B1
APPLICATION


GRANTED
A1- Application with search report.
A2 - Application without search report.

Same number to application number
B1 - Granted patent.
B2 - Claims modified after grant.
International ApplicationsPCT/GB02/02806

WO03014498 A1
APPLICATION

PUBLISHED


PCT only for applications (a "PCT patent"does not exist).

Publication converted to a WO (World).
A1 - 1st publication.
A2 - 2nd publication.
B1- Amended claims.
United States of America (US)US 11/409,718

US 20010002490 A1



US 6,174,724 B1
APPLICATION

PUBLISHED




GRANTED
No kind code.

Different number to application number
A1 - 1st publication.
A2 - republication.
A9 - corrected publication.

B1 - not previously published.
B2 - previously published.
United Kingdom (GB)GB 9322552

GB 2276857 A

GB 2276857 B
APPLICATION

PUBLISHED

GRANTED
No kind code.

A - Published patent

B - Granted patent
Japan (JP)JP 20010068913

JP 2001298650 A


JP 3228293 (B2)
APPLICATION

PUBLISHED


GRANTED
No kind code.

Different number to application number
A - laid open.

B1, B2 - Granted patent