High refractive index polymeric siloxysilane compositions
CA 2465494 A1 · Owner: Seelye, David E. · Inventors: Kunzler, Jay F.; Ozark, Richard M.; Seelye, David E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Optically transparent, relatively high refractive index polymeric compositions and ophthalmic devices such as intraocular lenses contact lenses and corneal , inlays made therefrom are described herein. The preferred polymeric compositions are produced through the polymerization of one or more siloxysilane monomers or the copolymerization of one or more siloxysilane monomers with one or more aromatic or non-aromatic non-siloxy monomers hydrophobic monomers or hydrophilic monomers.
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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
- Filed October 16, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 16, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2024.
- 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.