Patents by Inventor David Chee-Fai Law

David Chee-Fai Law 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).

  • Perlite-based insulation board
    Patent number: 5749954
    Abstract: A perlite-based insulation board includes, by dry weight, between about 50% and about 76% expanded perlite; between about 15% and about 45% fibers; between about 1% and about 5% starch; between about 2% and about 9% bituminous material; and about 0% to about 3% alum. The fibers are between about 50% and about 95% by dry weight recycled newsprint fibers and between about 5% and about 50% by dry weight virgin cellulose fibers, such as flax and/or peanut hull fibers. In one embodiment, the virgin cellulose fibers are, by dry weight, between about 10% and 40% flax fibers and about 60% and 90% peanut hull fibers.
    Type: Grant
    Filed: July 15, 1996
    Date of Patent: May 12, 1998
    Assignee: Johns Manville International, Inc.
    Inventors: David Chee-Fai Law, Christopher Paul Sandoval, Ruben G. Garcia