Hypoglycemic thiazolidinediones and intermediates
CA 2111447 C · Owner: Clark, David A. · Inventors: Clark, David A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Optically pure thiazolidinedione alcohols and ethers of the formula:, (wherein Y is CH~OH, CH~OH or CH~OR in which R is alkyl, phenylalkyl, phenyl or alkoxyalkyl) and synthetic intermediates for preparing the alcohols and ethers. These compounds have utility as hypoglycemic and hypocholesterolemic agents. Process for the preparation of a series of optically pure thiazolidinedione alcohols and ethers. Pharmaceutical compositions of the alcohols ethers including pharmaceutically acceptable acid addition salts thereof.
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 July 1, 1992 and granted August 13, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 1, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 1, 2014.
- 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.