Patents by Inventor Judith L. Benham

Judith L. Benham 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).

  • High temperature phenolic resins and friction elements prepared therefrom
    Patent number: 4395498
    Abstract: High temperature phenolic resins suited for use for example in an automotive or similar brake or in a clutch, are provided by a blend of the reaction product of a phenolic compound, naphthalenic compound, and formaldehyde with selected prior art resins. The mole ratio range of naphthalenic compound: phenolic compound: formaldehyde is about 1: 1:0.8-5:1-10. Friction particles and friction elements can be prepared from said reaction product optionally being blended with said selected prior art resins. An improved method of making friction elements is also provided which uses such binder.
    Type: Grant
    Filed: September 18, 1981
    Date of Patent: July 26, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Judith L. Benham
  • Liquid crystal compositions including pleochroic dye
    Patent number: 4232950
    Abstract: Liquid crystal compositions containing pleochroic dyes. The pleochroic dyes are substituted anthraquinones useful in guest-host combinations with nematic liquid crystal compositions having positive dielectric anisotropy. Electro-optic devices containing these guest-host combinations are employed.
    Type: Grant
    Filed: February 23, 1979
    Date of Patent: November 11, 1980
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Judith L. Benham