Patents by Inventor John Wing-Keung Lau

John Wing-Keung Lau 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: 5743841
    Abstract: A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of an acid component, at least about 0.1% by weight of a source of fluoride ions, and a stable foam forming amount of a foaming agent system having both cationic and non-ionic functionality. A method of transforming the asbestos-containing material into a non-asbestos material using the present composition in the form of a foam also disclosed.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: April 28, 1998
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Jacob Block, Natalia Vera Krupkin, Daniel Reid Kuespert, Gary Masaru Nishioka, John Wing-Keung Lau, Nigel Innes Palmer
  • Patent number: 5591691
    Abstract: Flexible metal foil catalyst members suitable for use in catalytic devices for combustion engine emission control are prepared by electrophoretic deposition using an aqueous slurry of catalyst support particles. The deposited support layer is of uniform thickness and stable surface area. The catalyst support may then be impregnated with catalytic species and assembled into a catalytic device. The catalyst members from the invention are especially suitable for use in automotive applications, and more especially in electrically heated catalytic devices.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: January 7, 1997
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Semyon D. Friedman, Awdhoot V. Kerkar, Ernest W. Hughes, Rasto Brezny, John Wing-Keung Lau, Jacob Block
  • Patent number: 4962068
    Abstract: PbO-B.sub.2 O.sub.3 -Ag.sub.2 O glasses having a preferred weight ratio range of 76-88:10-15:2-10 have glass transistion temperatures of less than 300.degree. C. and are especially useful for adhering together ceramic substrates such as for attaching integrated circuits to ceramic substrates. The glasses can be formulated with Ag particulates and organics and applied as pastes to provide conductive adhesives.
    Type: Grant
    Filed: December 4, 1989
    Date of Patent: October 9, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: John Wing-Keung Lau, Anastasia M. Conlon