Patents by Inventor Sundeep G. Shankwalkar

Sundeep G. Shankwalkar 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).

  • Aircraft hydraulic fluid basestocks
    Patent number: 6030543
    Abstract: The present invention is a composition particularly suitable for use as a base for aircraft non-flammable hydraulic fluids with reduced wear according to the ASTM four ball test. The compositions comprise trialkyoxyalkyl phosphate esters optionally formulated with alkyl phosphite esters and alkyl and alkaryl phosphate esters.
    Type: Grant
    Filed: March 4, 1993
    Date of Patent: February 29, 2000
    Assignee: Great Lakes Chemical Corporation
    Inventors: Douglas G. Placek, Sundeep G. Shankwalkar
  • Synthetic ester lubricant having improved antiwear properties
    Patent number: 5560849
    Abstract: The antiwear properties of synthetic ester lubricants intended for use at high temperatures (150.degree. C. to 350.degree. C.) are improved by adding to the lubricants a hydrocarbon insoluble, synthetic ester soluble, aryl diphosphate ester composition containing a major amount of an aryl diphosphate ester of the formula: ##STR1## wherein Ar is unsubstituted or alkyl (C.sub.1 -C.sub.12) substituted arylene and R is unsubstituted or alkyl (C.sub.1 -C.sub.12) substituted aryl.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: October 1, 1996
    Assignee: FMC Corporation
    Inventors: Sundeep G. Shankwalkar, Douglas G. Placek
  • Triaryl phosphate ester composition and process for its preparation
    Patent number: 5206404
    Abstract: The invention is a novel composition of alkylated phenyl phosphate esters comprising by weight 1% to 20% trialkylphenyl phosphate, 10% to 50% dialkylphenyl monophenyl phosphate, 15% to 60% monoalkylphenyl diphenyl phosphate and less than 2% triphenyl phosphate and a process for preparing the composition comprising passing the composition at least once through a thin film evaporator at a temperature of about 200.degree. C. to about 250.degree. C. at a pressure sufficiently less than 5 kPa to evaporate about 5% to about 30% of the composition.
    Type: Grant
    Filed: April 27, 1992
    Date of Patent: April 27, 1993
    Assignee: FMC Corporation
    Inventors: Louis T. Gunkel, Douglas G. Placek, Michael P. Marino, Jr., John Crosby, Sundeep G. Shankwalkar