Polymeric antimicrobials and their use in pharmaceutical compositions
CA 2102282 C · Owner: Alcon Laboratories, Inc. · Inventors: Park, Joonsup
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel polymeric antimicrobials having spacer moieties between amine and/or ammonium moieties have good antifungal activity. These compounds are useful in pharmaceutical and cosmetic compositions as preservatives and in contact lens care compositions as preservatives and/or disinfectants.
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 2, 1993 and granted December 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 2, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 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.