Expired Canadian patentCanada
Substituted vinylcephalosporins, processes for their preparation and their use as medicaments
CA 1340424 C · Owner: Metzger, Karl Georg · Inventors: Schmidt, Gunter; Endermann, Rainer; Metzger, Karl Georg
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Antibacterial .beta.-lactams of the formula in which, R1 to R5 are hydrogen or various organic radicals.
Read the whole patent
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 March 9, 1999. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 9, 2016.
- 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 24, 1988
GrantedMarch 9, 1999
Term endedMarch 9, 2016
Patent numberCA 1340424 C
Classification (IPC)C07D501/20 +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.