Patents by Inventor Norman H. Ng

Norman H. Ng 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).

  • Modified phenolic foams
    Patent number: 4525492
    Abstract: Phenolic foams and a method of producing phenolic foam material from phenol-formaldehyde resins having a phenol to formaldehyde mole ratio of between about 1:3 and 1:4.5 are described. These materials are useful for insulation and other uses, particularly in the building trades. They are dimensionally and thermally stable, fire resistant and low in cost.
    Type: Grant
    Filed: June 4, 1982
    Date of Patent: June 25, 1985
    Assignee: Fiberglas Canada Inc.
    Inventors: Mary H. Rastall, Norman H. Ng, Edwin J. MacPherson