Patents by Inventor Brian S. Randall

Brian S. Randall 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).

  • Fast drying gypsum products
    Patent number: 7572328
    Abstract: A slurry is made including water, at least 50% by weight calcium sulfate hemihydrate, and a specific polycarboxylate dispersant prepared using at least three repeating units. A first repeating unit is a vinyl ether-type repeating unit. A second repeating unit includes a maleic acid-type repeating unit. A third repeating unit includes an acrylic acid-type repeating unit. The polymer dispersant has a molecular weight of from about 20,000 to about 80,000 Daltons. The slurry made from this composition can be made at reduced water levels to speed drying and reduce drying costs.
    Type: Grant
    Filed: June 14, 2005
    Date of Patent: August 11, 2009
    Assignee: United States Gypsum Company
    Inventors: Dennis M. Lettkeman, Qingxia Liu, John W. Wilson, Brian S. Randall, David R. Blackburn, Michael P. Shake
  • Floor Covering Containing Polyvinyl Butyral and Method of Making the Same
    Publication number: 20080271840
    Abstract: A floor covering comprising polyvinyl butyral is provided.
    Type: Application
    Filed: April 1, 2008
    Publication date: November 6, 2008
    Inventors: Brian S. Randall, Paul D. Evans, Wallace J. Hammel
  • Process for manufacturing a floor covering having a foamed backing formed from recycled polymeric material
    Patent number: 6860953
    Abstract: The present invention provides a cushioned floor covering having a backing material formed from waste polymeric material and a blowing agent wherein the blowing agent may be activated either before or after the backing material is adhered to the floor covering. The waste polymeric material includes from about 0 to 40 percent aliphatic polyamide material and is granulated, densified and extruded at a temperature that does not exceed the temperature at which the blowing agent would be activated.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: March 1, 2005
    Assignee: Collins & Aikman Floorcoverings, Inc.
    Inventors: Mark L. Grizzle, Lynn E. Preston, Wallace J. Hammel, Brian S. Randall, Paul D. Evans, Jr.
  • Floor covering with a reinforced foam backing
    Publication number: 20040062903
    Abstract: A reinforced foam backing for a floor covering is presented. The reinforced foam backing comprises a foam layer comprising at least one thermoplastic polymeric material. The foam layer has a plurality of voids substantially uniformly distributed therein. The reinforced foam backing further comprises a reinforcing material adhered to the foam sheet.
    Type: Application
    Filed: September 26, 2002
    Publication date: April 1, 2004
    Inventors: Paul D. Evans, Wallace J. Hammel, Brian S. Randall