Patents by Inventor Robert H. Holzknecht

Robert H. Holzknecht 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).

  • Refrigeration leak sealant and method
    Patent number: 4487707
    Abstract: A stop leak composition for sealing leaks in refrigeration systems and method for using same. A mixture of smooth surfaced particles having a size small relative to the leak size is suspended in refrigeration oil and injected into the refrigerant circuit of a system. The particles will be forced into small leaks and will agglomerate to seal the leak. Graphite particles and Teflon.RTM. particles in size ranges from 20 microns to 65 mesh are suitable.
    Type: Grant
    Filed: September 16, 1983
    Date of Patent: December 11, 1984
    Inventor: Robert H. Holzknecht