Antiinflammatory and analgesic gel preparation
CA 2110119 C · Owner: Iwasa, Akira · Inventors: Kasai, Shuichi; Iwasa, Akira; Imamori, Katsumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antiinflammatory and analgesic gel preparation comprising diclofenac or its salts an ester of a dibasic acid, a lower alcohol and a nonionic polymer or a mixture of nonionic polymers selected from the group consisting of (a) 1.5-4% by weight of hydroxypropyl cellulose having a molecular weight of 500,000 or greater (b) 2-4% by weight of hydroxyethyl cellulose having a molecular weight of 1,250,000 or greater and (c) 1.5-4% by weight of a mixture of hydroxypropyl cellulose having a :molecular weight of 500,000 or greater and hydroxyethyl cellulose having a molecular weight of 1,250,000 or greater and having a viscosity of 5,000- 35,000 cps and a yield value of 5 dyne/cm2 or greater. The …
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 26, 1993 and granted May 27, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 26, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 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.