Patents by Inventor N.V. Vijaya Raghavan

N.V. Vijaya Raghavan 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 device, composition therefor, and method for preparing the composition
    Patent number: 4018507
    Abstract: A nematic liquid crystal composition comprises a fluorinated Schiff base of the general formula, X--Ph--HC=N--Ph--F, where X is an alkyl, acyl, acyloxy or alkoxy group having from 1 to 10 carbon atoms, and a p-alkoxy benzylidene-p-alkyl aniline, if desired with a small amount of a p-alkoxy benzylidene-p-cyanoaniline. An electro-optical device comprises a container for a layer of the liquid crystal composition described, a layer of such composition therein, and means to supply a current across all or a selected or predetermined area of such layer to cause alignment of the liquid crystals. Methods of making the fluorinated Schiff base, the liquid crystal composition and the device are provided.
    Type: Grant
    Filed: September 5, 1974
    Date of Patent: April 19, 1977
    Assignee: American Micro-Systems, Inc.
    Inventor: N.V. Vijaya Raghavan