Expired Canadian patentCanada
Solvates of b-lactam antibiotic
CA 2002597 C · Owner: Eckrich, Thomas M. · Inventors: Hoying, Richard C.; Eckrich, Thomas M.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The crystalline bis(DMF), dihydrate mono(DMF) and mono(DMF) forms of 7.beta.-2'-(R)-2'-phenyl-2'-amino-acetamido -3-chloro-3-(1-carbadethiacephem)-4-carboxylic acid (LY163892) are useful intermediates to the monohydrate form of LY163892.
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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 9, 1989 and granted March 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 9, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 9, 2011.
- 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 9, 1989
GrantedMarch 23, 1999
Term endedNovember 9, 2009
Patent numberCA 2002597 C
Classification (IPC)C07D463/22 +1 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.