Ophthalmic composition including a cationic glycoside and an anionic therapeutic agent
CA 2302232 C · Owner: Ellis, Jeanne Yang · Inventors: Ellis, Edward James; Ellis, Jeanne Yang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There are disclosed compositions and methods for treating the surface of the eye, or contact lenses to be placed on the eye with an aqueous composition , comprising a quaternary nitrogen-containing ethoxylated glycoside and a therapeutic agent. The subject invention is particularly suited for use with silicone-containing contact lenses. Examples of specific compositions include aqueous solutions of lauryl methyl gluceth-10 hydroxypropyl-dimonium chloride in combination with anionic polysaccharides such as hyaluronic acid.
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 September 17, 1998 and granted December 23, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 17, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 17, 2020.
- 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.