Expired Canadian patentCanada
Crystalline carbapenem derivative
CA 2103223 C · Owner: Kawamoto, Isao · Inventors: Miyauchi, Masao; Endo, Rokuro; Kawamoto, Isao
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A storage stable form of the pivaloyloxymethyl ester of the carbapenem derivative known as (1R,5S,6S)-2-(4R)-2-oxo-4-pyrrolidinylthio-6-((1R)- 1-hydroxyethyl-1-methyl-1-carbapen-2-em-3-carboxylic acid in crystalline form.
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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 November 16, 1993 and granted September 24, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 16, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 16, 1993
GrantedSeptember 24, 2002
Term endedNovember 16, 2013
Patent numberCA 2103223 C
Classification (IPC)C07D477/00 +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.