Rearview mirror
CA 1331913 C · Owner: Samsung Electron Devices Co. Ltd. · Inventors: Lee, Eung-Sang; Park, Sung-Joon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a rearview mirror for absorbing light when the orientation of the liquid crystal is caused to change. The crystal comprises a nematic liquid crystal of negative dielectric anisotropy containing a mixture of a blue dye by 2% and a cholesteric material, such that the ratio of the thickness of the liquid crystal layer to the focal conic pitch d/p lies within the range of from 0.4 to 0.6. A silicone nitride layer is deposited on the upper transparent electrode (3) so as to form an insulating film. A transparent adhesive layer (11) is formed on the upper surface of an upper glass plate (1) with a glass plate (12) which is pressed down onto said adhesive layer (1).
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 September 13, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 13, 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.