Patents by Inventor Rolfe J. Hartley

Rolfe J. Hartley 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).

  • Ashless or low-ash synthetic base compositions and additives therefor
    Patent number: 5089156
    Abstract: An ashless or low-ash oleaginous liquid composition comprising a major amount of hydrogenated poly-.alpha.-olefin oligomer fluid having a viscosity in the range of about 2 to about 10 cSt at 100.degree.C., and minor amounts of at least the following: A) hydrogenated poly-.alpha.-olefin oligomer fluid having a viscosity in the range of about 40 to about 120 cSt at 100.degree.C.; and B) antiwear/extreme pressure agent selected from phosphorus-containing ashless dispersant, boron-containing ashless dispersant, and phosphorus- and boron-containing ashless dispersant. Compositions of this type can be formed having excellent high and low temperature viscosity characteristics and excellent shear stability. To this end, the preferred compositions are devoid or substantially devoid of conventional polymeric high molecular weight viscosity index improvers.
    Type: Grant
    Filed: October 10, 1990
    Date of Patent: February 18, 1992
    Assignee: Ethyl Petroleum Additives, Inc.
    Inventors: Douglas R. Chrisope, Rolfe J. Hartley
  • Oil-soluble phosphorus antiwear additives for lubricants
    Patent number: 4857214
    Abstract: Oil-soluble reaction products of inorganic phosphorus containing acids or anhydrides with a boron compound and ashless dispersants such as alkenyl succinimides are useful as antiwear/EP additives in lubricants.
    Type: Grant
    Filed: September 16, 1988
    Date of Patent: August 15, 1989
    Assignee: Ethylk Petroleum Additives, Inc.
    Inventors: Andrew G. Papay, Rolfe J. Hartley