Sustained release compositions, methods for producing the same and uses thereof
CA 2378714 A1 · Owner: Igari, Yasutaka · Inventors: Yamamoto, Kazumichi; Hata, Yoshio; Igari, Yasutaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Sustained release compositions containing a physiologically active substance or its salt, hydroxynaphthoic acid or its salt and a lactic acid-glycolic acid polymer or its salt, wherein the product of the weight-average molecular weight of the lactic acid-glycolic acid polymer by the amount (µmol) of the terminal carboxyl group per unit mass (g) of the lactic acid-glycolic acid polymer is from 1,200,000 to 3,000,000 (inclusive); and drugs etc. containing , these sustained release compositions.
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 13, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 13, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 13, 2022.
- 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.