High salt content rapid disinfection solution for contact lenses
CA 2008762 C · Owner: Novartis Ag · Inventors: Tsao, Fu-Pao,; Stone, John Harlon; Littlefield, Susan Ann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disinfection solution, primarily for use in conjunction with contact lenses is disclosed, comprising an amount of a pharmaceutically acceptable ionic salt which is equivalent in, ionic strength to at least 5 % w/v sodium chloride at least one of a C2-, 6alkanol and a, C3-8alkylene glycol a pharmaceutically acceptable surfactant optionally a , buffer and a, viscosity enhancing agent and water.
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 January 29, 1990 and granted January 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 2012.
- 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.