Thiazolidinedione derivatives, their production and their use
CA 2065799 C · Owner: Takeda Chemical Industries, Ltd. · Inventors: Ikeda, Hitoshi; Sohda, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a novel thiazolidinedione derivative of the general formula (I):, see Formula I wherein R1 and R2 are the same or different and are a hydrogen atom or a lower alkyl group, or a salt thereof. The thiazolidinedione derivative has hypoglycemic activity and hypolipidemic activity.
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 10, 1992 and granted September 3, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 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.