Patents by Inventor Douglas Rodenberg

Douglas Rodenberg 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).

  • Synthetic lubricant based on enhanced performance of synthetic ester fluids
    Patent number: 5783528
    Abstract: An improved lubricant is provided by combining ester lubricants with alkylated polyaromatic lubricants. This combination provides a lubricant that exhibits the oxidation/varnish control of alkylated naphthenics, while at the same time providing the high temperature stability of the ester-type lubricants. A wide variety of ester lubricants can be used such as polyol esters, dimeracid esters and the like. Preferably, the alkylated aromatic lubricant has a viscosity greater than 25 up to 220 cSt measured at 40.degree. C. Greases can also be formed using this combination.
    Type: Grant
    Filed: January 7, 1997
    Date of Patent: July 21, 1998
    Assignee: Diversey Lever, Inc.
    Inventor: Douglas Rodenberg