Expired Canadian patentCanada
Synthetic process
CA 1083159 A · Owner: Smith Kline & French Laboratories Limited · Inventors: White, George R.
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 process is disclosed for the preparation of amino compounds and particularly 2-amino-2-alkylthio-1-nitroethylenes. These compounds are useful intermediates in the production of histamine H2-antagonists.
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.
FiledApril 30, 1976
GrantedAugust 5, 1980
Term endedAugust 5, 1997
Patent numberCA 1083159 A
Classification (IPC)C07D277/24 +2 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.