Patents by Inventor Brackin L. Andrews

Brackin L. Andrews 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).

  • Method and apparatus for patterning encapsulated liquid crystal layers
    Patent number: 5818556
    Abstract: An encapsulated liquid crystal layer is patterned by placing a mask into contact with a coated substrate. The mask is held against the substrate, for example, by a vacuum, to form a seal. The assembly is submerged in a solvent to dissolve the exposed region of the encapsulated liquid crystal material.
    Type: Grant
    Filed: July 24, 1996
    Date of Patent: October 6, 1998
    Assignee: Raychem Corporation
    Inventors: John R. Havens, Binh Vu Cao, Frank Wasilewski, Philip J. Jones, Damoder Reddy, Brackin L. Andrews
  • Method of making a liquid crystal light valve
    Patent number: 5695594
    Abstract: A method is disclosed for making a liquid crystal light valve in which the electro-optically active element is a liquid crystal composite sandwiched between two electrodes. The liquid crystal composite comprises plural volumes of liquid crystal material dispersed in a polymer matrix. By use of a tie layer, the problem of stress clearing is markedly reduced or eliminated. The tie layer material can be either a liquid crystal material or a telomer, crosslinkable or otherwise.
    Type: Grant
    Filed: January 5, 1996
    Date of Patent: December 9, 1997
    Assignee: Raychem Corporation
    Inventors: Aldrich N. K. Lau, Damoder Reddy, Akira Tomita, Lanchi P. Vo, Brackin L. Andrews, Kathleen Di Zio, Hundi Kamath
  • Method for making encapsulated liquid crystal material
    Patent number: 5202063
    Abstract: Encapsulated liquid crystal material is made by mixing liquid crystals, a containment medium, and a carrier medium made of a water-miscible monohydric alcohol and water in the proportion between 5:95 and 60:40 weight/weight to form an emulsion; applying the emulsion onto a substrate and drying the emulsion to remove the carrier medium.
    Type: Grant
    Filed: February 12, 1992
    Date of Patent: April 13, 1993
    Assignee: Raychem Corporation
    Inventors: Brackin L. Andrews, Gilbert Garza, Mark F. Wartenberg, William Seeley
  • Stabilized poly(aryl ether ketone) compositions
    Patent number: 4593061
    Abstract: Poly(aryl ether ketones) are stabilized against crosslinking and thermooxidative degradation at elevated temperatures, e.g. temperatures typically used to melt process the polymer, by incorporating therein a particulate molecular sieve, for example, a crystalline aluminosilicate, such as a synthetic zeolite. The amount of molecular sieve is preferably about 0.5 to about 5% by weight based on the weight of the poly(aryl ether ketone).
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: June 3, 1986
    Assignee: Raychem Corporation
    Inventors: Christine E. Vogdes, Brackin L. Andrews