Biphenyl esters and liquid crystal materials and devices containing them
CA 1338988 C · Owner: Qinetiq Limited · Inventors: Bishop, David Ian; Bradshaw, Madeline Joan; Jenner, John Anthony
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Biphenyl esters are provided of the formula: wherein , represents , or , R1 represents C3 - C12 alkyl, alkoxy, alkylcarbonyloxy, alkoxycarbonyl or alkoxycarbonyloxy j is 0 or 1, R2 represents C3 - C12 alkyl or alkoxy one of Q1 or Q2, is fluorine and the other is hydrogen provided that when j is 0 and, is , and both R1 and R2 are n-alkyl then the total number, of carbon atoms in R1 and R2 is more than 12. These compounds may be used as constituents of liquid crystal mixtures which show a room temperature ferroelectric smectic phase and a, number of such mixtures are described.
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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
- Granted March 11, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 11, 2014.
- 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.