A gel-forming liquid carrier composition
CA 2095728 C · Owner: Bogentoft, Conny · Inventors: Carlsson, Anders; Bogentoft, Conny
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A carrier composition which is a liquid at or below room temperature and forms a high viscosity layer or gel at body temperature, which comprises a water-soluble nonionic cellulose ether having a , cloud point not higher than 40°C preferably 35°C, a charged surfactant and optional additives in water. Said carrier composition can be used for oral or local administration of a pharmacologically active substance to the skin mucous membrane, the eye or a , body cavity.
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 October 30, 1991 and granted January 22, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 2013.
- 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.