Process for making cephalosporins
CA 1057282 A · Owner: Societa' Farmaceutici Italia S.P.A. · Inventors: Foglio, Maurizio; Franceschi, Giovanni; Suarato, Antonino
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is disclosed for preparing a cephalosporin of structure:, (III), (III), where R is selected from the class consisting of hydrogen alkyl, having from 1 to 4 carbon atoms cyano-methyl, thienyl-methyl, furyl-methyl naphthyl-methyl, phenyl-methyl, phenoxy-methyl phenyl-isopropyl, phenoxy-isopropyl, pyridyl-4-thiomethyl tetra-, zolyl-1-methyl;, R1 is selected from the class consisting of hydroxy alkoxy, having from 1 to 4 carbon atoms trichloroethoxy, benzyloxy, p-, methoxy-benzyloxy p-nitrobenzyloxy, benzhydryloxy, triphenylmethoxy, phenacyloxy, p-halophenacyloxy; and Z is selected from the class consisting of hydrogen hydroxy, -O-Alkyl, -O-CO-Alkyl, -Br, -I -N3, -NH2, -O-COCH3, …
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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 June 26, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 26, 1996.
- 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.