Optical film, elliptically polarizing plate, circularly polarizing plate, liquid crystal display element, and method of producing optical film
CA 2592415 C · Owner: Dainippon Ink And Chemicals, Inc. · Inventors: Maruyama, Kazunori; Ono, Yoshiyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical film 10 of the present invention includes a plurality of optically anisotropic layers 13 which are laminated wherein the optically anisotropic , layer including: a photoalignment layer (A) 11 in which a liquid crystal aligning , capability has been generated by means of photoirradiation; and a polymer layer (B) 12 which , contains a , liquid crystal compound that has a polymerizable group and which is obtained , by , polymerization in a state where it has been aligned by the photoalignment layer (A) 11, wherein the photoalignment layer (A) 11 and the polymer layer (B) 12 are bonded by , covalent bonding. The plurality of optically anisotropic layers 13 may be an optically , …
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 December 27, 2005 and granted May 21, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 27, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.