Patents Represented by Attorney Peter C. Bawden

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  • Removal of carcinogenic hydrocarbons from used lubricating oil using activated carbon
    Patent number: 4977871
    Abstract: A system for the substantial removal of polynuclear aromatic compounds from lubricating oil used to lubricate the engine of a motor vehicle comprising a sorbent located within the lubricating system and through which the lubricating oil circulates which is capable of removing substantially all of the polynuclear aromatic hydrocarbons from the lubricating oil. The sorbent is preferably activated carbon which may be impregnated with additives typically found in lubricating oils especially antioxidants, to prolong the useful life of the oil.
    Type: Grant
    Filed: November 7, 1988
    Date of Patent: December 18, 1990
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Darrell W. Brownawell, Donald J. Norris, Harold Shaub