Rhodanine derivatives and process for preparing the same
CA 1264758 C · Owner: Taiho Pharmaceutical Company, Limited · Inventors: Ogawa, Kazuo; Honna, Takaji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are a compound of the formula (1), wherein R1 is lower alkyl, A is a group of the formula , (in which R3 is hydrogen or lower alkyl) or methylene, and R2 is hydrogen or a group of the formula -(CH2)nCOOH (in which n is an integer of 1 to 6) or a salt of the derivative, and preparation thereof. The compounds have an excellent aldose reductase inhibitory action.
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 January 23, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 2007.
- 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.