Expired Canadian patentCanada
4-(3-acylamino-2-oxo-1-azetidinyl)-4-oxo-2-butenoic acid
CA 1254218 A · Owner: Squibb (E.R.) & Sons, Inc. · Inventors: Treuner, Uwe D.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Antibacterial activity is exhibited by (3-acylamino)-2-azetidinones having in the 1-position a group of the formula, or a salt or ester thereof wherein R5 and R6 are the same or different and each is hydrogen or alkyl.
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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 May 16, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 16, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 9, 1984
GrantedMay 16, 1989
Term endedMay 16, 2006
Patent numberCA 1254218 A
Classification (IPC)C07D417/12 +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.