Patents by Inventor Harold F. Gallman

Harold F. Gallman 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).

  • High density fused silica mixes, refractory shapes made therefrom, and method of making the same
    Patent number: 5360773
    Abstract: A refractory mix for forming a fused silica based refractory shape consisting essentially of a high purity fused silica and a binder system consisting essentially of a high purity colloidal silica solution and a high purity ammonium lignosulfonate. The invention also comprises fused silica based refractory shapes formed from such mix by pressing and firing.
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: November 1, 1994
    Assignee: Indresco Inc.
    Inventors: Howard M. Winkelbauer, Harold F. Gallman