Patents by Inventor Peter M. Attard

Peter M. Attard 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: 6740395
    Abstract: A rough-surfaced substrate, such as a fiberboard, is provided with a smoother surface by applying a coating comprising calcium sulfate hemihydrate which has been prevented from hydrating to gypsum by set preventer, and which sets when brought into contact with a set initiator, e.g. aluminum sulfate, preferably present on the surface of the substrate.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: May 25, 2004
    Assignee: United States Gypsum Company
    Inventors: John D. Halm, Aida L. Carbo, Michael R. Lynn, Richard B. Stevens, Charles J. Miller, Peter M. Attard, Therese A. Fults
  • Publication number: 20030134554
    Abstract: A rough-surfaced substrate, such as a fiberboard, is provided with a smoother surface by applying a coating comprising calcium sulfate hemihydrate which has been prevented from hydrating to gypsum by set preventer, and which sets when brought into contact with a set initiator, e.g. aluminum sulfate, preferably present on the surface of the substrate.
    Type: Application
    Filed: December 21, 2001
    Publication date: July 17, 2003
    Inventors: John D. Halm, Aida L. Carbo, Michael R. Lynn, Richard B. Stevens, Charles J. Miller, Peter M. Attard, Therese A. Fults
  • Patent number: 6406779
    Abstract: A paperless gypsum/fiber board with improved surface characteristics has at least one surface comprising a combination of fully hydrated gypsum and reinforcing fiber and has been coated with a primer comprising an aqueous emulsion of a film-forming polymeric material.
    Type: Grant
    Filed: December 23, 1998
    Date of Patent: June 18, 2002
    Assignee: United State Gypsum Company
    Inventors: Adelaida L. Carbo, Peter M. Attard
  • Patent number: 5336318
    Abstract: A clay-free, asbestos-free and glass microbubble-free, drying type Joint compound containing an in-situ or associative thickener as a substitute for asbestos and any clay substitute therefor. In particular, these drying type joint compounds contain no attapulgus clay thereby improving viscosity stability, crack resistance and shrinkage. The lightweight joint compounds contain treated expanded perlite, treated to render it water-insensitive. The preferred in-situ thickeners are acidic acrylate copolymers. It has been found that the in-situ thickeners should be used in combination with the normal cellulosic thickeners used in joint compounds Instead of as replacements therefor. The joint compounds contain the usual fillers and latex emulsion binders, with at least about 50% by weight of the drying type joint compound being a filler selected from the group consisting of calcium carbonate and calcium sulfate dihydrate.
    Type: Grant
    Filed: March 3, 1993
    Date of Patent: August 9, 1994
    Assignee: United States Gypsum Company
    Inventors: Peter M. Attard, Therese A. Espinoza
  • Patent number: 4820754
    Abstract: The unequal porosity and different textures of a drywall reinforced with joint tape and joint compound are concealed by a paint made from a low cost, easily dispersible powder in which the pigment volume concentration is about 70% to about 75%. A vinyl acetate/ethylene copolymer serves as the principle binder and a water soluble cellulose ether thickens the water dispersion of kaolin, attapulgus clay, mica, sodium potassium aluminum silicate and calcium carbonate.
    Type: Grant
    Filed: January 22, 1988
    Date of Patent: April 11, 1989
    Assignee: United States Gypsum Company
    Inventors: Robert H. Negri, Peter M. Attard
  • Patent number: 4743475
    Abstract: The unequal porosity and different textures of a drywall reinforced with joint tape and joint compound are concealed by a paint made from a low cost, easily dispersible powder in which the pigment volume concentration is about 70% to about 75%. A vinyl acetate/ethylene copolymer serves as the principle binder and a water soluble cellulose ether thickens the water dispersion of kaolin, attapulgus clay, mica, sodium potassium aluminum silicate and calcium carbonate.
    Type: Grant
    Filed: February 9, 1987
    Date of Patent: May 10, 1988
    Assignee: United States Gypsum Company
    Inventors: Robert H. Negri, Peter M. Attard