Expired Canadian patentCanada
2-oxo-1-(substituted sulfonyl) amino- carbonylazetidines
CA 1309097 C · Owner: Straub, Henner · Inventors: Ermann, Peter Hans; Treuner, Uwe Dietmar; Drossard, Jakob-Matthias
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Antibacterial activity id exhibited by .beta.-lactams having a 3-acylamino substituent and having in the 1-position an activating group of the formula -?-NH-SO2-R wherein, R is , -NH=A3-R4 or -NH-A4-?-A6-R4 .
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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 October 20, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 2009.
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FiledJune 15, 1987
GrantedOctober 20, 1992
Term endedOctober 20, 2009
Patent numberCA 1309097 C
Classification (IPC)C07D403/12 +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.