Patents by Inventor Cynthia B. House

Cynthia B. House 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 of making thermoplastic hardboard from acetylated mat
    Patent number: 4418101
    Abstract: A wet-felted mat of wood fibers is acetylated by coating the mat with a quantity of acetic anhydride ranging from 5 to 70% by volume of the mat and heating the mat at a temperature of from 150.degree. to 300.degree. F. while confining substantially all of the acetic anhydride within the mat for about 20 to 120 minutes. The acetylated mat is pressed into hardboard which may be bent into a variety of loops, spirals, helices, and other curvilinear shapes to make articles of furniture, protective packaging products and the like.
    Type: Grant
    Filed: December 27, 1982
    Date of Patent: November 29, 1983
    Assignee: United States Gypsum Company
    Inventors: Cynthia B. House, Robert J. Leichti
  • Thermoplastic hardboard from acetylated mat
    Patent number: 4388378
    Abstract: A wet-felted mat of wood fibers is acetylated by coating the mat with a quantity of acetic anhydride ranging from 5 to 70% by volume of the mat and heating the mat at a temperature of from 150.degree. to 300.degree. F. while confining substantially all of the acetic anhydride within the mat for about 20 to 120 minutes. The acetylated mat is pressed into hardboard which may be bent into a variety of loops, spirals, helices, and other curvilinear shapes to make articles of furniture, protective packaging products and the like.
    Type: Grant
    Filed: December 5, 1980
    Date of Patent: June 14, 1983
    Assignee: United States Gypsum Company
    Inventors: Cynthia B. House, Robert J. Leichti