Expired Canadian patentCanada
Pharmaceutical compositions for treatment of hyperproliferate skin disease
CA 1309658 C · Owner: Schering Corporation · Inventors: Blythin, David J.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The use of azanaphthalenes of the formulae Ia Ib, and Ic for the preparation of compositions useful in the treatment of hyperproliferate skin disease: Ia, Ib, Ic, wherein:, Ac is, or , Ac' Ac"
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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 November 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 2009.
- 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 3, 1987
GrantedNovember 3, 1992
Term endedNovember 3, 2009
Patent numberCA 1309658 C
Classification (IPC)C07D221/20 +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.