Expired Canadian patentCanada
Quinoxaline derivatives as immune regulants
CA 1057289 A · Owner: Eli Lilly · Inventors: Campbell, Jack B.
Overview
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing novel quinoxaline derivatives, acenaphtho1,2-bquinoxalines and dibenzoa,cphenazines, by condensation of suitable aromatic diamines with the appropriate 1,2-diketones is described herein. The compounds are useful as immune regulatory agents.
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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 June 26, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 26, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedJune 26, 1979
Term endedJune 26, 1996
Patent numberCA 1057289 A
Classification (IPC)C07D241/38
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.