Patents by Inventor Withiam Michael C.

Withiam Michael C. 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).

  • Fire retardant pigment
    Patent number: 4842772
    Abstract: Alumina trihydrate particles coated with alkali metal silicate, alkaline earth metal silicate or alumino silicate are useful as fillers in paper and plastics and provide good opacity and brightness properties as well as fire retardancy. The alumina trihydrate products are prepared by reaction of alumina trihydrate with an alkali metal silicate, an alkaline earth metal silicate, or alumino silicate, or the reaction of alkali metal silicate or alkaline earth metal silicate with aluminum sulfate to produce an alumino silicate precipitate coating in situ.
    Type: Grant
    Filed: June 1, 1987
    Date of Patent: June 27, 1989
    Assignee: J. M. Huber Corporation
    Inventor: Withiam Michael C.