Patents by Inventor Guirec Y Cosquer

Guirec Y Cosquer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Liquid crystal compounds with branched or cyclic end groups
    Patent number: 7462427
    Abstract: The use of a mesogenic compound having a terminal end chain comprising carbon, oxygen, or sulphur, which has at least one pendent C1-4alkyl, C1-4alkoxy or a cycloalkyl ring, arranged no more than 6 atoms from the end of the chain either decreasing the melting point, increasing the clearing point, increasing the speed of switching and/or increasing the tilt angle of a liquid crystal mixture. Examples of such compounds are of formula (I) where M is a mesogenic core group, and X and Y are terminal groups, provided that at least one group X or Y is a group of sub-formula (i) where Z1, Z2, R1, R2, R3, R4, R5, R6, R7, s, q, m and n are as defined in the specification. Novel compounds of formula (I) are also described and claimed.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: December 9, 2008
    Assignee: Qinetiq Limited
    Inventors: John W Goodby, Michael Hird, Kenneth J Toyne, Guirec Y Cosquer, Stephen J Cowling, Neil Gough
  • Liquid crystal compounds with branched or cyclic end groups
    Publication number: 20040206933
    Abstract: The use of a mesogenic compound having a terminal end chain comprising carbon, oxygen, or sulphur, which has at least one pendent C1-4alkyl, C1-4alkoxy or a cycloalkyl ring, arranged no more than 6 atoms from the end of the chain either decreasing the melting point, increasing the clearing point, increasing the speed of switching and/or increasing the tilt angle of a liquid crystal mixture. Examples of such compounds are of formula (I) where M is a mesogenic core group, and X and Y are terminal groups, provided that at least one group X or Y is a group of sub-formula (i) where Z1, Z2, R1, R2, R3, R4, R5, R6, R7, s, q, m and n are as defined in the specification. Novel compounds of formula (I) are also described and claimed.
    Type: Application
    Filed: April 29, 2004
    Publication date: October 21, 2004
    Inventors: John W Goodby, Michael Hird, Kenneth J Toyne, Guirec Y Cosquer, Stephen J Cowling, Neil Gough