Patents by Inventor Dale G. Pillsbury

Dale G. Pillsbury 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 metal salts of hydrocarbyl dithiophosphoric acid
    Patent number: 5380448
    Abstract: This invention relates to a process for preparing an overbased metal salt of hydrocarbyl dithiophosphoric acid comprising neutralizing hydrocarbyl dithiophosphoric acid with an amount of metal oxide sufficient to form said overbased metal salt of hydrocarbyl dithiophosphoric acid, which metal oxide has a surface area of no less than about 4 m.sup.2 per gram up to about 12 m.sup.2 per gram and whereby the overbased metal salt of hydrocarbyl dithiophosphoric acid thus formed has a base metal to phosphorus weight ratio within the range of greater than about 1.2:1 up to about 1.3:1.
    Type: Grant
    Filed: February 7, 1994
    Date of Patent: January 10, 1995
    Assignee: Ethyl Petrolium Additives, Inc.
    Inventors: Abbas Kadkhodayan, Dale G. Pillsbury, Paul G. Griffin
  • Methods for the production and purification of di (nitrophenyl) ethers
    Patent number: 4700011
    Abstract: Di(nitrophenyl) ethers are prepared by the reaction of a halogeno-nitrophenyl compound with a base wherein the water in the reaction system is removed during the reaction. The reaction can be advantageously carried out at two different temperatures. The use of a molar excess of the halogeno-nitrophenyl compound improves the yield of di(nitrophenyl) ether. Crude di(nitrophenyl) ether is purified by extraction into a non-aqueous solvent using a dual temperature method to maintain the ether in the liquid phase.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: October 13, 1987
    Assignee: Amoco Corporation
    Inventor: Dale G. Pillsbury
  • Process for the preparation of zero valent bis-arene transition metal compounds
    Patent number: 4526724
    Abstract: An improved process for the preparation of zero valent bis-arene transition metal compounds comprises reducing bis-arene transition metal (I) compound with a high-electropositive metal in an ether solvent at reflux temperature.
    Type: Grant
    Filed: September 30, 1983
    Date of Patent: July 2, 1985
    Assignee: Standard Oil Company (Indiana)
    Inventor: Dale G. Pillsbury