Patents by Inventor Robert E. Habermas

Robert E. Habermas 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).

  • Reconditioning of phosphate ester hydraulic control fluids
    Patent number: 4302335
    Abstract: A method and apparatus for recovering or maintaining phosphate ester type hydraulic fluids in serviceable condition which comprises sequentially filtering the fluid through at least a coalescer type filter and a mole-sieve type filter, preferably in conjunction with an activated charcoal powder filter and a small pore particle filter. In maintaining a hydraulic system in service, a small quantity of the hydraulic fluid is continually circulated from a reservoir through the filters and returned to the reservoir.
    Type: Grant
    Filed: February 13, 1980
    Date of Patent: November 24, 1981
    Assignee: The Detroit Edison Company
    Inventor: Robert E. Habermas