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Expired Canadian patentCanada

Cefadroxil solvates and method for producing the same

CA 1339420 C · Owner: Marsili, Leonardo · Inventors: Marsili, Leonardo

CIPO record

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Abstract From the Canadian patent

A process is disclosed for preparing and isolating a novel cefadroxil solvate of dimethylacetamide N-methyl-2-pyrrolidone or monomethylformamide. This solvate is useful for the preparation of a crystalline cefadroxyl hemihydrate which has a K.F. between about 3.5 and 2.0% and is more stable than other cefadroxyl molecules.

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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 September 2, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 2, 2014.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 25, 1988
GrantedSeptember 2, 1997
Term endedSeptember 2, 2014
Patent numberCA 1339420 C
Classification (IPC)C07D501/22 +2 more

Timeline

Timeline From CIPO dates

198919921995199820012004200720102013Application filedJan 25, 1988Patent grantedSep 2, 1997Term endedSep 2, 2014

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.