Patents Assigned to The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdon of Great Britian and Northern Ireland of Whitehall
  • Liquid crystal compounds
    Patent number: 4512636
    Abstract: A novel liquid crystal compound has a formula: ##STR1## where: ##STR2## is a trans-2,5-disubstituted-1,3-dioxan ring or a 2,5-disubstituted-1,3-imidine ring ##STR3## is a 1,4-disubstituted benzene ring optionally containing one or more F, Cl or CH.sub.3 groups as lateral substituents; R.sub.1 is an alkyl group; andX is a terminal group selected from H, CN, Cl, F and R.sub.2 where R.sub.2 is selected from alkyl R.sub.3, alkoxy OR.sub.3, alkylcarbonyloxy OCOR.sub.3 and alkoxycarbonyloxy OCOOR.sub.3.
    Type: Grant
    Filed: June 7, 1983
    Date of Patent: April 23, 1985
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdon of Great Britian and Northern Ireland of Whitehall
    Inventors: Beatrice M. Andrews, Neil Carr, George W. Gray, Christine Hogg