1-phthalazone derivatives, process for preparation thereof, and use thereof
CA 1135697 A · Owner: Ishikawa, Masayuki · Inventors: Ito, Shigeru; Kobayashi, Masahiko; Tanaka, Hiromichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel l-phthalazone derivatives of the following formula wherein R1, R2 and R3 are as defined in Claim 1 and pharmaceutically accept-, able acid addition salts thereof; a process for production thereof; a pharmaceutical composition containing said compound; and a method for treating a thrombotic disease using said compound.
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
- Granted November 16, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 16, 1999.
- 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.