Expired Canadian patentCanada
Picolinic acid derivatives and processes for their preparation
CA 1088545 A · Owner: Scherico Ltd. · Inventors: Sherlock, Margaret H.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to processes for the preparation of novel picolinic acid derivatives and to novel picolinic acid derivatives so obtained. The novel compounds are useful in the treatment of acne.
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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 October 28, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 28, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 24, 1976
GrantedOctober 28, 1980
Term endedOctober 28, 1997
Patent numberCA 1088545 A
Classification (IPC)C07D213/78 +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.