Expired Canadian patentCanada
Vancomycin precipitation process
CA 2076067 C · Owner: Krishnan, Lalitha · Inventors: Krishnan, Lalitha
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 invention is an improvement in isolating vancomycin from an aqueous solution of pH 5 to 9 which comprises separating the vancomycin from the solution by adding an alkali or alkaline earth metal inorganic salt to the solution.
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
- Filed August 13, 1992 and granted July 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 13, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 13, 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.
FiledAugust 13, 1992
GrantedJuly 9, 2002
Term endedAugust 13, 2012
Patent numberCA 2076067 C
Classification (IPC)C07K9/00 +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.