Patents Examined by Rich Weisbeiger
  • Process for producing fibrous composites, particularly double floor plates, as well as plates produced by this process
    Patent number: 5536533
    Abstract: A process for producing fibrous composite materials from feed stock formed reliminarily from a gypsum binder and chopped cellulose fibers, and saturating the mixture with water to the extent of at least 1.2 times its normal hydrated state, and beating the material to provide a fleece that is then spread on a flat surface and subjected to pressure for a sufficient length of time to drive out a substantial portion of the moisture from the product. The compression step is carried out long enough to achieve a bulk density of approximately 9/10 the dry bulk density of the components prior to hydration.
    Type: Grant
    Filed: March 19, 1993
    Date of Patent: July 16, 1996
    Assignees: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V., Goldbach GmbH
    Inventors: Heinz Sattler, Volker Thole, Sebald Pallhorn, Bernhard Schmelmer
  • Aqueous size for fiber reinforced high temperature composites
    Patent number: 5430096
    Abstract: Stable aqueous size of ammonia-and/or amine-neutralized poly(amide-acid) of certain aromatic dianhydrides with certain aromatic diamines.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: July 4, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Sang-Hak Hwang, Thomas J. Proffitt, Jr.