Patents by Inventor Deepak Kumar Tuli

Deepak Kumar Tuli 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 the preparation of calcium phenate detergents from cashew nut shell liquid
    Patent number: 5910468
    Abstract: A process for the preparation of sulphurized calcium phenate from cashew nut shell liquid (CNSL). Distilled or hydrogenated distilled CNSL is reacted with calcium salt and sulphur in the presence of promoters to obtain a reaction mixture. The reaction mixture is subjected to the step of carbonation to obtain basic sulfurized calcium phenate, which may be subjected to a further step of basefication to obtain overbased sulphurized calcium phenate. Such a calcium phenate is added to lubricating oil or grease as an additive.
    Type: Grant
    Filed: April 6, 1998
    Date of Patent: June 8, 1999
    Assignee: Indian Oil Corporation Ltd.
    Inventors: Khem Chand Dohhen, Harish Chander Bhatia, Krishan Kumar Swami, Rakesh Sarin, Deepak Kumar Tuli, Madan Mohan Rai, Akhilesh Kumar Bhatnagar
  • Process for the preparation of synthetic lubricant base stocks
    Patent number: 5714661
    Abstract: A process for the preparation of oligomers which are used in synthetic lubricant base stocks. The oligomers are prepared by contacting a mixture of linear olefins and n-paraffins contained in cracked refinery streams having 6 to 24 carbon atoms with activated Y-zeolites. The oligomers and unreacted monomers are subjected to the step of hydrogenation and the lower saturated paraffins are separated therefrom to produce synthetic lubricant base stock.
    Type: Grant
    Filed: May 31, 1996
    Date of Patent: February 3, 1998
    Inventors: Deepak Kumar Tuli, Sabyasachi Sinha Ray, Rakesh Sarin, Madan Mohan Rai, Sobhan Ghosh, Akhilesh Kumar Bhatnagar