Wettable surface modified contact lens fabricated from an oxirane containing hydrophobic polymer
CA 1290516 C · Owner: Novartis Pharmaceuticals Canada Inc./Novartis Pharma Canada Inc. · Inventors: Goldenberg, Merrill; Mueller, Karl Friedrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Wettable Surface Modified Contact Lens Fabricated From An Oxirane Containing Hydrophobic Polymer Abstract, A contact lens possessing a wettable surface in its ocular aqueous environment of use fabricated from a hydrophobic addition polymer incorporating between about 0.5 and about 30 % by weight oxirane substituted units in the backbone thereof wherein the outer, surfaces of said lens contain an effective hydrophilicity inducing amount of a reaction product of said oxirane substituted units of the formula I, (I), wherein R is hydrogen or methyl; R1 is carbonyl or lower alkylene; n is 1 to 4; and R° is hydrogen or , with a reactive water soluble nucleophile selected from an organic amine …
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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
- Granted October 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 2008.
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Timeline
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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.