Method and composition for cleaning contact lenses
CA 2072001 C · Owner: Groemminger, Suzanne F. · Inventors: Groemminger, Suzanne F.; De, Nimai C.; Heiler, David J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Contact lenses are cleaned by contacting the lenses with a composition containing an effective amount of one or more cyclodextrins. The compositions can also be employed at elevated temperatures or may contain suitable antimicrobial agents in order to simultaneously clean and disinfect the lenses.
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 15, 1991 and granted November 3, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 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.