Sulfur-containing fused pyrimidine derivatives, their production and use
CA 2019369 C · Owner: Naka, Takehiko · Inventors: Saijo, Taketoshi; Suno, Masahiro; Naka, Takehiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a compound represented by the formula (I) or a salt thereof:, wherein R1 represents an aliphatic hydrocarbon aralkyl or, aryl group which may be substituted; R2 represents hydrogen an aliphatic hydrocarbon group having one or more substituents, an aryl group which may be substituted an, amino group which may be substituted a formyl group; a, nitro group or a halogeno group; A represents a divalent hydrocarbon chain of 2 to 4 carbon atoms which may be substituted; and m represents an integer of 0 to 2 which is, useful for treatment and prevention of diseases induced by abnormalities in regulation of reactions in vivo mediated through endothelin or interleukin 1, and of immune …
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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 June 20, 1990 and granted July 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 2012.
- 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.