Patents by Inventor Theodore C. Wallace

Theodore C. Wallace 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).

  • Controlled coextrusion of barrier sheet
    Patent number: 4676936
    Abstract: The thickness of the barrier layer in coextruded multilayer, thermoformable resinous sheet material is controlled by transverse color monitoring during coextrusion of the sheet.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: June 30, 1987
    Assignee: The Dow Chemical Company
    Inventors: Theodore C. Wallace, Janet M. Streif
  • Foamed polymeric materials
    Patent number: 4649164
    Abstract: Foamed water-swellable polymeric water absorbent materials are prepared by contacting a polymer capable of having a water-swellable character and containing acid moieties in acid form with a blowing agent such as sodium bicarbonate, which blowing agent is capable of neutralizing the acid moieties of the polymer. The foamed polymers are useful in a wide variety of water absorbent applications.
    Type: Grant
    Filed: July 3, 1985
    Date of Patent: March 10, 1987
    Assignee: The Dow Chemical Company
    Inventors: Laurie J. Scott, Robert E. Erickson, Theodore C. Wallace
  • Thermoformable multilayer barrier structures
    Patent number: 4647509
    Abstract: A multilayer thermoformable packaging material is provided and includes one layer of barrier material containing a resin having low gas and vapor transmission properties. The multilayer structure also includes one layer which utilizes scrap produced from the multilayer structure. Other optional layers may be included in the structure to provide additional features such as rigidity and toughness.
    Type: Grant
    Filed: October 7, 1985
    Date of Patent: March 3, 1987
    Assignee: The Dow Chemical Company
    Inventors: Theodore C. Wallace, Bernie A. Kozakiewicz
  • Foamed polymeric materials
    Patent number: 4529739
    Abstract: Foamed water-swellable polymeric water absorbent materials are prepared by contacting a polymer capable of having a water-swellable character and containing acid moieties in acid form with a blowing agent such as sodium bicarbonate, which blowing agent is capable of neutralizing the acid moieties of the polymer. The foamed polymers are useful in a wide variety of water absorbent applications.
    Type: Grant
    Filed: July 24, 1984
    Date of Patent: July 16, 1985
    Assignee: The Dow Chemical Company
    Inventors: Laurie J. Scott, Robert E. Erickson, Theodore C. Wallace