Mesomorphic compound, liquid crystal composition containing same and liquid crystal device using same
CA 2016106 C · Owner: Canon Kabushiki Kaisha · Inventors: Terada, Masahiro; Mori, Shosei; Iwaki, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid crystal composition includes a mesomorphic compound of the formula (I): (see formula above I), and a mesomorphic compound of the formula (II): (see formula above II), and/or a mesomorphic compound of the formula (III): (see formula above III), (i.e. a specific combination of (I) + (II) (I) + (III) or, (I) + (II) + (III)). The liquid crystal composition is effective in improving response characteristics such as response speed and a temperature-dependence of response speed when used as an element of a liquid crystal device.
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 May 4, 1990 and granted March 28, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 4, 2012.
- 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.