Alignment facilities for optical dyes
CA 2707730 C · Owner: Shao, Jiping · Inventors: Shao, Jiping; Foller, Peter C.; Kumar, Anil
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of making an alignment facility for an optical dye on at least a portion of an optical substrate is described. The method comprises forming an at least partial coating on at least a portion of the optical substrate. The at least partial coating comprises an at least partially ordered liquid crystal material having at least a first general direction wherein the at least partial coating has a thickness greater than 6 microns. Further an ophthalmic element is described, comprising an ophthalmic substrate and an alignment facility for an optical dye. The alignment facility is connected to at least a portion of an ophthalmic substrate and comprises at least one at least partial coating …
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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 May 26, 2004 and granted April 29, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 26, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 26, 2026.
- 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.