Quinazolinone derivative and processes for preparing the same
CA 1290756 C · Owner: Matsuoka, Yuzo · Inventors: Yamada, Yoshihisa; Matsuoka, Yuzo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a quinazolinone derivative of the formula:, (I), wherein R1 is a hydrogen atom or a halogen atom or a salt, thereof and processes for preparing the same. The quinazolinone derivative of formula (I) is useful for the treatment of diabetic complications.
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 October 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 2008.
- 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.