Expired Canadian patentCanada
Amine acid salt compounds and process for the production thereof
CA 2227264 C · Owner: Yoo, Seo Hong · Inventors: Yoo, Seo Hong
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 stoichiometric acid moiety transfer reaction for the preparation of an acid salt of an amine compound is disclosed. The acid moiety transfer reaction provides amine acid salts of high purity and having crytalline structure of uniform size and shape.
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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 August 16, 1996 and granted October 22, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 16, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 16, 2018.
- 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 16, 1996
GrantedOctober 22, 2002
Term endedAugust 16, 2016
Patent numberCA 2227264 C
Classification (IPC)C07D307/52 +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.