Patents by Inventor Velautha-Cumaran Arunasalam

Velautha-Cumaran Arunasalam 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).

  • Lubricating oil compositions
    Patent number: 6153564
    Abstract: A lubricating oil composition is provided comprising a major amount of an oil of lubricating viscosity and a minor amount of, as an additive, at least one compound comprising a metal core and bonded thereto one or more ligands capable of rendering the compound oil-soluble or oil-dispersible, at least one ligand having at least two hydrocarbyl groups of which one has 1 to 7 carbon atoms and the other or another has more carbon atoms.
    Type: Grant
    Filed: June 17, 1999
    Date of Patent: November 28, 2000
    Assignee: Infineum USA L.P.
    Inventors: Velautha-Cumaran Arunasalam, Ian A. W. Bell, John A. Cleverley, Ronald P. Wangner
  • Lubricant additives
    Patent number: 6110878
    Abstract: Oil-soluble or oil-dispersible trinuclear molybdenum-sulfur compounds are made by reacting less than three, such as 1.5 to 2.5, preferably two to 2.1, molar equivalents of a disulfide with one molar equivalent of a compound containing the [Mo.sub.3 S.sub.13 ].sup.2- ion. The trinuclear compounds include S-containing ligands that are derived from the disulfide reactant via cleavage of the disulfide bond; the ligands are bound to the core via the S atoms.
    Type: Grant
    Filed: December 11, 1998
    Date of Patent: August 29, 2000
    Assignee: Exxon Chemical Patents Inc
    Inventors: Jonathan M. McConnachie, Edward Ira Stiefel, Ian Alexander Weston Bell, Velautha-Cumaran Arunasalam
  • Method of synthesizing Mo.sub.3 S.sub.x containing compounds
    Patent number: 5906968
    Abstract: A method of making an oil-soluble or oil-dispersible trinuclear molybdenum-sulfur compound, comprising: reacting two to less than three equivalents of a tetrahydrocarbyl thiuram disulfide and one equivalent of a compound containing the ?Mo.sub.3 S.sub.13 !.sup.2- ion to produce a trinuclear molybdenum compound of the formula Mo.sub.3 S.sub.x (L).sub.4 wherein x is from 4 to 10 and L is dihydrocarbyl-dithiocarbamate.
    Type: Grant
    Filed: December 12, 1997
    Date of Patent: May 25, 1999
    Assignee: Exxon Research & Engineering Company
    Inventors: Jonathan M. McConnachie, Edward I. Stiefel, Ian Alexander Weston Bell, Velautha-Cumaran Arunasalam