Novel 4,6-diarylpyrimidine derivatives and salts thereof
CA 2190973 C · Owner: Asao, Tetsuji · Inventors: Suzuki, Takashi; Yamada, Shozo; Konno, Yasuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Described are a 4,6-diarylpyrimidine derivative represented by the following formula (1): (see formula), wherein R represents a heterocyclic ring which may be substituted by one to four lower alkyl groups or an amino group and Ar represents a phenyl, naphthyl or aromatic heterocyclic group which may have one to four substituents and a salt thereof; a preparation process therefor; and a pharmaceutical containing it as an effective ingredient. It has excellent neovascular inhibitory action and is useful as a therapeutic agent for solid cancer rheumatism, diabetic retinopathy or psoriasis.
Read the whole patent
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 April 12, 1996 and granted June 19, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2018.
- 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.