Patents by Inventor Bennett Sturgeon

Bennett Sturgeon 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 crystals esters
    Patent number: 4542230
    Abstract: A liquid crystal ester has a structure: ##STR1## where X and Y are fluorine or hydrogen at least one being hydrogen, and Z is either:(a) ##STR2## where R.sub.2 is alkyl, alkoxy, alkylcarbonyloxy or alkoxycarbonyloxy(b) ##STR3## where R.sub.3 is an alkyl group. The ester may be prepared by a conventional esterification from the corresponding phenol ##STR4## and the corresponding acid chloride Z--COCl. The ester may be used in mixtures with other liquid crystal compounds for use in known electro-optic devices.
    Type: Grant
    Filed: September 30, 1980
    Date of Patent: September 17, 1985
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: George W. Gray, David Lacey, Martin G. Pellatt, Bennett Sturgeon