Expired Canadian patentCanada
Penicillins
CA 1083142 A · Owner: Beecham Group Limited · Inventors: Clayton, John P.; Bentley, Peter H.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A class of 6-methoxy-.alpha.-carboxy penicillins have antibacterial activity against a wide range of Gram-negative organisms.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted August 5, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 5, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 12, 1976
GrantedAugust 5, 1980
Term endedAugust 5, 1997
Patent numberCA 1083142 A
Classification (IPC)C07D499/72 +1 more
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.