Patents by Inventor Walter W. Wydra

Walter W. Wydra 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).

  • Patent number: 7257930
    Abstract: Exemplary methods and assemblies for preventing corrosion of metal connector devices, e.g., zinc-galvanized joist hangers and fasteners, used for assembling outdoor structures such as decks from wood components pretreated with alkaline copper quat (ACQ), ammoniacal copper quat (ACQ-B), copper azole (CA), or mixtures thereof. Membrane barriers separate metal from wood, and seal around fasteners thus minimizing corrosion of the connector devices and fasteners.
    Type: Grant
    Filed: December 15, 2003
    Date of Patent: August 21, 2007
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Antonio J. Aldykiewicz, Jr., Gerald L. Blay, Gregory N. Ciampa, Ann M. Jansen, Edwin C. Schaughency, Lawrence S. Shapiro, Albina N. Velikin, Walter W. Wydra
  • Patent number: 6235365
    Abstract: An improved waterproofing membrane comprising a preformed waterproofing adhesive layer, releasable sheet liner, and a string or plurality of strings operative to cut the release sheet liner into smaller portions for selective removal to expose portions of the adhesive layer for installation onto a building surface or civil engineering surface.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: May 22, 2001
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Edwin C. Schaughency, George W. Starsmeare, Walter W. Wydra
  • Patent number: 5224774
    Abstract: The present invention relates to an improved concrete additive product comprising synthetic concrete reinforcing fibers packaged in a closed paper package, whereby under the influence of mechanical action in a concrete mixer, the packaging material disintegrates and the fibers are uniformly distributed throughout the fresh concrete mixture. The synthetic fibers may additionally be coated with a dispersant. The present invention also relates to the methods of using the above improved concrete additive product.
    Type: Grant
    Filed: August 7, 1990
    Date of Patent: July 6, 1993
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Stephen A. Valle, John E. Sorenson, Robert C. Hegger, Walter W. Wydra
  • Patent number: 5203629
    Abstract: The present invention relates to a method for modifying the properties of a concrete by introducing a solid admixture, contained in a paper package, into a fresh concrete, said solid admixture being selected from the group consisting of air-entraining admixtures, air detrainer admixture, accelerating admixture, alkali-reactivity reducer, superplasticizer, pumping aids, water-reducing admixture, corrosion inhibitor, permeability reducer, fibers, and mixtures thereof; and mixing the fresh concrete in a batch type mixer for sufficient time to cause the packaging material to disintegrate and distribute the admixture relatively uniformly throughout the fresh concrete.
    Type: Grant
    Filed: April 10, 1991
    Date of Patent: April 20, 1993
    Assignee: W.R. Grace & Co.-Conn.
    Inventors: Stephen A. Valle, John E. Sorenson, Robert C. Hegger, Walter W. Wydra