Oxime derivative
CA 2100918 C · Owner: Hamanaka, Nobuyuki · Inventors: Takahashi, Kanji; Tokumoto, Hidekado; Hamanaka, Nobuyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oxime derivative (1):, (I), wherein R' is hydrogen or lower alkyl; R2 is hydrogen alkyl, phenyl, cycloalkyl, a, monocyclic ring containing nitrogen lower alkyl substituted by a benzene ring or cycloalkyl, or a lower alkyl substituted by a monocyclic ring containing nitrogen; R3 is alkyl, phenyl, cycloalkyl, a monocyclic ring containing nitrogen a lower alkyl, substituted by a benzene ring or cycloalkyl or lower alkyl substituted by a, monocyclic ring containing nitrogen wherein the ring in R2 and R3 may be, substituted by lower alkyl alkoxy, halogen, nitro, or trihalomethyl; and salts thereof. These compounds possess PGI2 receptor agonist activity and are, expected to be useful for …
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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 July 20, 1993 and granted January 21, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 20, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 20, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.