The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 08, 1999
Filed:
Apr. 06, 1998
Khem Chand Dohhen, Faridabad, IN;
Harish Chander Bhatia, Faridabad, IN;
Krishan Kumar Swami, Faridabad, IN;
Rakesh Sarin, Faridabad, IN;
Deepak Kumar Tuli, Faridabad, IN;
Madan Mohan Rai, Faridabad, IN;
Akhilesh Kumar Bhatnagar, Faridabad, IN;
Indian Oil Corporation Ltd., Bombay, IN;
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.