Expired Canadian patentCanada
Enzymatic process for preparing 7-aminocephalosporanic acid and derivatives
CA 2058216 C · Owner: Cambiaghi, Stefano · Inventors: Cambiaghi, Stefano; Tomaselli, Sergio; Verga, Roberto
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Transformation of Cephalosporin C or its derivatives and salts into 7-aminocephalosporanic acid or its derivatives by an enzymatic two stage process with enzymes immobilized on a solid matrix.
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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
- Filed December 20, 1991 and granted December 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 20, 1991
GrantedDecember 14, 1999
Term endedDecember 20, 2011
Patent numberCA 2058216 C
Classification (IPC)C12P35/02 +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.