Patents by Inventor Chester Robert Slahetka

Chester Robert Slahetka 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 insulation board and method of making the same
    Patent number: 3988199
    Abstract: A perlite insulation board is disclosed herein and includes, as conventional ingredients, expanded perlite, organic fiber and binder, the perlite, being the largest single ingredient, by dry weight, in the board. The insulation board also includes gypsum in an amount less than the perlite but preferably in an amount sufficient to form a gypsum matrix throughout the board. A method of making a perlite insulation board of the general type just described is also disclosed herein.
    Type: Grant
    Filed: January 27, 1975
    Date of Patent: October 26, 1976
    Assignee: Johns-Manville Corporation
    Inventors: Roy Wayne Hillmer, Nicholas Francis Morrone, Chester Robert Slahetka