Patents by Inventor Thomas E. Rehder

Thomas E. Rehder 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).

  • Process for expanding and coating perlite
    Patent number: 4525388
    Abstract: Expanded perlite is produced while simultaneously or substantially simultaneously coating the expanded perlite with an hydrophobic coating material by passing the expanded perlite and heated expander exhaust gases from the expansion chamber through a cooling and coating chamber provided with spray nozzles to provide a stream of atomized coating material onto the expanded perlite, while upstream thereof an air intake and temperature sensor are situated to control the air flow and temperature in the cooling and coating chamber so as to provide proper curing temperatures for the coating material upon the expanded perlite before it is separated from the exhaust gases.
    Type: Grant
    Filed: December 23, 1983
    Date of Patent: June 25, 1985
    Assignee: USG Corporation
    Inventors: Thomas E. Rehder, Terrance L. Williams