Patents by Inventor William R. Cowper

William R. Cowper 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).

  • Soluble silicate glass forms and method of manufacturing
    Patent number: 5663110
    Abstract: A hexagonal pyramid shape silicate glass form having top and bottom surfaces wherein the distance between opposite corners at the bottom surface is in the range of 11/16 to 11/2". The slope of the pyramidal sides of the silicate glass form ranges from 23.degree. to 30.degree. off the vertical sloping from a larger bottom surface to a smaller top surface. The height of the silicate glass form is between 5/8" and 11/8". This form is very stable with a minimum of internal stresses. In this way, the dusting of the particle is reduced.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: September 2, 1997
    Assignee: PQ Corporation
    Inventor: William R. Cowper