Patents by Inventor Wesley A. Middleton

Wesley A. Middleton 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).

  • Chlorine-free diesel engine lubricating composition
    Patent number: 5370805
    Abstract: A railway diesel engine lubricating composition is essentially free of zinc dithiophosphate wear inhibitors and chlorinated inhibitors. This composition has an oil of lubricating viscosity; a noncarbonated sulfurized calcium alkyl phenate, a carbonated sulfurized calcium alkyl phenate, a calcium Mannich alkyl phenate, and an ethylene carbonate modified polybutene bis-succinimide. The noncarbonated sulfurized calcium alkyl phenate has a sulfur to metal ratio of between 1.1:1 and 2:1, the alkyl group of that phenate has from 8 to 35 carbon atoms, and the alkalinity value of that phenate is from 40 to 200 mg. KOH/gram. The noncarbonated sulfurized metal alkyl phenate is prepared by reacting a tetrapropylene phenol, sulfur, and a calcium base.
    Type: Grant
    Filed: November 18, 1993
    Date of Patent: December 6, 1994
    Assignee: Chevron Research and Technology Company, a Division of Chevron U.S.A. Inc.
    Inventors: Nancy K. Smrcka, Wesley A. Middleton
  • Lubricating oil compositions for internal combustion engines having silver bearing parts
    Patent number: 5244591
    Abstract: Essentially chlorine-free lubricating compositions having a TBN of 10-30 designed for use in internal combustion engines having silver bearing parts which provide protection for said bearings via the incorporation therein of certain unsaturated aliphatic carboxylic acids. An additive concentrate for said lubricating compositions is also disclosed.
    Type: Grant
    Filed: March 23, 1992
    Date of Patent: September 14, 1993
    Assignee: Chevron Research and Technology Company
    Inventor: Wesley A. Middleton