Surface coating of polymer objects
CA 2095044 C · Owner: Bausch & Lomb Incorporated · Inventors: Valint, Paul L. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of modifying surfaces of polymeric objects which comprises immersing the polymeric object in an aqueous dispersion of a polymerizable surfactant, a cross-linking agent and a free , radical initiator and exposing the immersant to ultraviolet light to form a permanent, cross-linked surface coating on the object. Also disclosed are coated objects prepared by this method which is particularly suited for coating contact 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 November 20, 1991 and granted June 11, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 20, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 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.