Expired Canadian patentCanada
Production of 7-(2-aminomethylphenylacetamido) -3-(1-carboxymethyltetrazol-5-ylthiomethyl) -3-cephem-4-carboxylic acid
CA 1136123 A · Owner: Bristol-Myers Squibb Company · Inventors: Endo, Masaki; Lim, Gary M.F.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Ceforanide is produced by the reduction in aqueous solution of a water-soluble salt of 7-(2-azidomethylphenylacetamido)-3-(1-carboxymethyltetrazol-5ylthiomethyl)-3-cephem-4-carboxylic acid using a boraneamine complex and Raney nickel.
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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 November 23, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 23, 1999.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 26, 1980
GrantedNovember 23, 1982
Term endedNovember 23, 1999
Patent numberCA 1136123 A
Classification (IPC)C07D501/36 +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.