Light modulation element
CA 1329252 C · Owner: Mitsui Petrochemical Industries, Ltd. · Inventors: Yamanaka, Tooru; Nishiyama, Shinichi; Yamaoka, Hideo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed herein is a light modulation element which comprises a liquid crystal element comprising a cell composed of two transparent substrates each substrate, being provided with a transparent electrode on one surface, and a liquid crystal material assuming a smectic A phase, said substrates being arranged so that the transparent electrodes are opposed to each other with a space therebetween which is filled with said liquid crystal material.
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
- Granted May 3, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 3, 2011.
- 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.