Patents by Inventor Leigh Walker

Leigh Walker 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).

  • Mold-inhibiting method and composition comprising dehydroacetic acid or salt thereof
    Patent number: 8530064
    Abstract: Disclosed is a method for inhibiting the growth of mold on building materials by application onto and/or incorporation into the building material of a mold-inhibiting composition comprising dehydroacetic acid or a salt thereof and, optionally, an additional fungicidal agent such as a quaternary ammonium compound. A preferred application of the method is the inhibition of mold growth on plasterboard (drywall).
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: September 10, 2013
    Assignee: Lonza, Inc.
    Inventors: Xiao Jiang, Leigh Walker
  • MOLD-INHIBITING METHOD AND COMPOSITION
    Publication number: 20100105768
    Abstract: Disclosed is a method for inhibiting the growth of mold on building materials by application onto and/or incorporation into the building material of a mold-inhibiting composition comprising dehydroacetic acid or a salt thereof and, optionally, an additional fungicidal agent such as a quaternary ammonium compound. A preferred application of the method is the inhibition of mold growth on plasterboard (drywall).
    Type: Application
    Filed: October 7, 2009
    Publication date: April 29, 2010
    Inventors: Xiao Jiang, Leigh Walker
  • Isothiazolone/amine oxide wood preservatives
    Patent number: 6448279
    Abstract: The present invention provides a wood preservative composition comprising an amine oxide and an isothiazolone. Another embodiment of the present invention is a method for preserving and/or waterproofing wood substrate by contacting the composition with the wood substrate.
    Type: Grant
    Filed: May 24, 2000
    Date of Patent: September 10, 2002
    Assignee: Lonza Inc.
    Inventors: Chuen-Ing Tseng, Leigh Walker
  • Copper/amine oxide wood preservatives
    Patent number: 6340384
    Abstract: The present invention provides a composition comprising an amine oxide and an aqueous copper amine complex. Another embodiment of the present invention is a method for preserving and/or waterproofing a wood substrate by contacting the composition with the wood substrate. Yet another embodiment is an article comprising a wood substrate and the composition of the present invention. This composition has high efficacy against fungi, including copper tolerant fungi such as brown rot and soft rot, and is phase stable at high concentrations. Additionally, the amine oxide in the composition may impart waterproofing properties. The composition of the present invention is halide free and is environmentally friendly.
    Type: Grant
    Filed: May 24, 2000
    Date of Patent: January 22, 2002
    Assignee: Lonza Inc.
    Inventor: Leigh Walker