Expired Canadian patentCanada
.beta.-LACTAM ANTIBIOTICS
CA 1291748 C · Owner: Ward, Neal · Inventors: Ward, Neal
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Crystalline anhydrous amoxycillin is prepared by removing bound solvent molecules from a crystalline solvate (other than the trihydrate) of amoxycillin. A preferred crystalline solvate is the monomethanolate.
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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 November 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 5, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 10, 1987
GrantedNovember 5, 1991
Term endedNovember 5, 2008
Patent numberCA 1291748 C
Classification (IPC)C07D499/68 +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.