Patents by Inventor Douglas S. Thornton

Douglas S. Thornton 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).

  • Process for the production of paper containing starch fibers and the paper produced thereby
    Patent number: 4243480
    Abstract: A process for the production of paper and paperboard is disclosed wherein water-insensitive starch fibers, produced by extrusion of a starch dispersion into a coagulating solution, are employed to replace all or part of the cellulosic or other pulp conventionally employed. There is also disclosed a method for the incorporation of functional additives into paper during the production thereof; and a method for binding fibers in non-woven webs.
    Type: Grant
    Filed: October 17, 1977
    Date of Patent: January 6, 1981
    Assignee: National Starch and Chemical Corporation
    Inventors: Henry R. Hernandez, Donald S. Greif, Albert N. Barna, Douglas S. Thornton
  • Water insensitive starch fibers and a process for the production thereof
    Patent number: 4139699
    Abstract: Water-insensitive starch fibers having an amylopectin content of about 55 to 100% by weight are prepared by extruding a colloidal starch dispersion in thread-like form into a moving coagulating bath. Water-insoluble additives may be incorporated into the starch dispersion so as to produce a fiber containing the additive in encapsulated form.
    Type: Grant
    Filed: October 17, 1977
    Date of Patent: February 13, 1979
    Assignee: National Starch and Chemical Corporation
    Inventors: Henry R. Hernandez, Donald S. Greif, Albert N. Barna, Douglas S. Thornton