Diazole and tetrazole derivatives of cyanomethylthioacetylcephalosporins
CA 1088519 A · Owner: E. R. Squibb & Sons, Inc. · Inventors: Treuner, Uwe D.; Breuer, Hermann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New diazole and tetrazolo derivatives of cyanomethylthioacetylcephalosporins of the following general formula, and their salts, wherein R is hydrogen lower alkyl, aralkyl, tri(lower, alkyl)-silyl a salt forming ion or the group , ;, R1 R2, R3 and R5 each is hydrogen or lower alkyl; R4 is lower alkyl, aryl or aralkyl; Y is oxygen sulfur or nitro-, gen; m is 2 or 3 and N is 0 or 1 the sum of m and n being, 3; are useful as antibacterial agents.
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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 28, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 28, 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.
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.