Use of amidoamines in ophthalmic compositions
CA 2187034 C · Owner: Dassanayake, Nissanke L. · Inventors: Park, Joonsup; Schlitzer, Ronald L.; Dassanayake, Nissanke L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The use of certain amidoamines to disinfect contact lenses and preserve ophthalmic compositions is described. Ophthalmic compositions containing these compounds as disinfecting agents or preservatives are also described. The amidoamines utilized in the present invention have potent antibacterial and antifungal activity and are chemically compatible with inorganic ions and other materials utilized in ophthalmic 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 February 26, 1996 and granted February 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 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.