Hypoglycemic agent
CA 2102591 C · Owner: Hongu, Mitsuya · Inventors: Inamasu, Masanori; Arakawa, Kenji; Funami, Nobuyuki
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 hypoglycemic agent which comprises as an active ingredient a dihydrochalcone derivative of the formula I: (see formula I) wherein Ar is an aryl group R1 is hydrogen atom or an acyl group, R2 is hydrogen atom an acyl group or .alpha.-D-glucopyranosyl group or R1 and R2 may combine together to form a substituted methylene group R3 and R4 are each hydrogen atom or an acyl group and a group of the formula: OR5 is a protected or unprotected hydroxy group or a lower alkoxy group or a pharmaceutically acceptable salt 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 November 5, 1993 and granted December 26, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 5, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 5, 2015.
- 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.