Patents by Inventor Lawrence Westcott

Lawrence Westcott 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).

  • Pressure-sensitive copying paper
    Patent number: 4223060
    Abstract: Self-contained pressure-sensitive copying material having a coating which contains both a particulate mineral color-developing material and microcapsules enclosing a solution of a colorless color former which is reactive with the color developing material to produce a colored product, in which the particles of color developing material (e.g. an acidic clay) and optionally the microcapsules as well, are chemically treated with a protective agent to inhibit premature color development wherein the protective agent may be a self-crosslinkable polymer, such as an aminoplast polymer (e.g. a urea-formaldehyde or melamine-formaldehyde polymer), or an epichlorohydrin polymer (e.g. an aminoepichlorohydrin or an amide/aminoepichlorohydrin polymer), or an anionic surfactant (e.g.
    Type: Grant
    Filed: December 1, 1978
    Date of Patent: September 16, 1980
    Assignee: Wiggins Teape Limited
    Inventors: Paul R. Raine, Lawrence Westcott
  • Pressure-sensitive copying paper
    Patent number: 4165398
    Abstract: A method of producing self-contained pressure-sensitive copying material having a coating which contains both a particulate mineral color-developing material and microcapsules enclosing a solution of a colorless color former which is reactive with the color developing material to produce a colored product, in which the particles of color developing material (e.g. an acidic clay) and optionally the microcapsules as well, are treated with a protective agent to inhibit premature color development. The protective agent may be a self-crosslinkable polymer, such as an aminoplast polymer (e.g. a urea-formaldehyde or melamine-formaldehyde polymer), or a epichlorohydrin polymer (e.g. an aminoepichlorohydrin or an amide/aminoepichlorohydrin polymer), or an anionic surfactant (e.g.
    Type: Grant
    Filed: January 12, 1977
    Date of Patent: August 21, 1979
    Assignee: Wiggins Teape Limited
    Inventors: Paul R. Raine, Lawrence Westcott
  • Paper having microcapsules deposited in depressions on a surface thereof has improved smudge-resistance characteristics
    Patent number: 4081188
    Abstract: Paper for use in pressure-sensitive copying systems consists of a base paper one surface of which is machine glazed and the opposite surface of which is left rough due to expulsion of moisture during manufacture. Those sheets which are provided with a color reactant have the reactant applied to the glazed surfaces thereof and those sheets which are provided with a microcapsule coating have the microcapsule coating applied to the rough surfaces thereof.
    Type: Grant
    Filed: September 17, 1976
    Date of Patent: March 28, 1978
    Assignee: Wiggins Teape Limited
    Inventor: Lawrence Westcott