Expired Canadian patentCanada
Boronic acid and ester inhibitors of thrombin
CA 2208971 C · Owner: Miller, William Henry · Inventors: Amparo, Eugene Cruz; Duncia, John Jonas Vytautas; Wityak, John
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel boronic acid and ester and carboxyl-modified amino acid compounds of formula (I): R1-Z-CHR1-A, which are inhibitors of trypsin-like enzymes are , disclosed, where R1, Z, R2 and A are defined within.
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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 December 13, 1995 and granted January 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 13, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 2017.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 13, 1995
GrantedJanuary 16, 2001
Term endedDecember 13, 2015
Patent numberCA 2208971 C
Classification (IPC)C07F5/02 +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.