Patents by Inventor Andrew Jeng

Andrew Jeng 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).

  • Hydrocarbyl ethers of sulfur-containing hydroxyl derived aromatics as synthetic lubricant base stocks
    Patent number: 5520709
    Abstract: Alkyl ethers of sulfur containing hydroxyl-derived aromatics have been found to be effective as high-performance synthetic lubricant base stocks with superior catalytic thermal/oxidative stabilities, excellent antiwear and load-carrying properties, as exemplified by bisphenol sulfide (BPS) based products. These ethers are also highly useful in fuel compositions.
    Type: Grant
    Filed: September 1, 1994
    Date of Patent: May 28, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Liwen Wei, Andrew G. Horodysky, Andrew Jeng, Ross A. Kremer
  • Dihydrobenzothiophenes as antioxidant and antiwear additives
    Patent number: 5514289
    Abstract: Novel dihydrobenzothiophenes prepared via condensation of arylthiols and carbonyl or epoxide containing reagents have been found to be effective antioxidant and antiwear additives in lubricant applications. These additives are made from relatively low cost mercaptans and carbonyl compounds in a one-step high yield reaction.
    Type: Grant
    Filed: April 13, 1995
    Date of Patent: May 7, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Halou Oumar-Mahamat, Andrew G. Horodysky, Andrew Jeng
  • Hydrocarbyl ethers of sulfur-containing hydroxyl derived aromatics as synthetic lubricant base stocks
    Patent number: 5344578
    Abstract: Alkyl ethers of sulfur-containing hydroxyl-derived aromatics have been found to be effective as high-performance synthetic lubricant base stocks with superior catalytic thermal/oxidative stabilities, excellent antiwear and load-carrying properties, as exemplified by bisphenol sulfide (BPS) based products. These ethers are also highly useful in fuel compositions.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: September 6, 1994
    Assignee: Mobil Oil Corporation
    Inventors: Liwen Wei, Andrew G. Horodysky, Andrew Jeng, Ross A. Kremer
  • Antioxidants for functional fluids
    Patent number: 5336420
    Abstract: An aromatic functional fluid, specifically a monoalkylated tetradecyl diphenyl oxide synthetic lubricant, contains a polymer-supported reaction product of an organic quaternary ammonium salt, derived from a mercapto-heterocycle and a quaternary ammonium salt. To produce the polymer-supported organic quaternary ammonium salt, the salt is reacted with a dicarboxylic acid or anhydride, specifically 2-dodecen-1-ylsuccinic anhydride. An arylamine antioxidant, such as alkylated phenyl naphthylamine, can be added to the polymer supported organic quaternary ammonium salt-treated functional fluid to impart extra antioxidant and stability properties.
    Type: Grant
    Filed: December 14, 1992
    Date of Patent: August 9, 1994
    Assignee: Mobil Oil Corporation
    Inventors: Andrew G. Horodysky, Shih-Ying Hsu, Andrew Jeng, Leslie R. Rudnick