Expired Canadian patentCanada
Epoxides
CA 1314899 C · Owner: Perchonock, Carl David · Inventors: Gleason, John Gerald; Perchonock, Carl David; Ku, Thomas Wen-Fu
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Herein are claimed intermediates useful for preparing certain leukotriene antagonists. These intermediates are represented by formula (I) (I), the various groups being defined herein.
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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 March 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 23, 2010.
- 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 14, 1986
GrantedMarch 23, 1993
Term endedMarch 23, 2010
Patent numberCA 1314899 C
Classification (IPC)C07D303/40 +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.