Controlled release tabletted medicine
CA 2181391 C · Owner: Generex Pharmaceuticals Inc. · Inventors: Modi, Pankaj
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A controlled release tablet formulation for gastro-intestinal administration is made with i) at least one medicinally active ingredient, ii) at least three core polymers, iii) at least one filler, iv) at least one binder. The core polymers are selected from the group consisting of copolymers of sucrose and epichlorohydrin having molecular weights of from 70 000 to 400 000 glucose polymers having molecular weights of from 10 000 to 300 000, polyethylene glycols having molecular weights of from 1000 to 100 000, polyvinyl alcohols having molecular weights of from 70 000 to 110 000 hydroxymethyl cellulose, hydroxyethyl cellulose hydroxypropyl cellulose, hydroxypropyl-methyl cellulose …
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 17, 1996 and granted February 15, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 17, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 2018.
- 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.