Patents by Inventor William Donald Hewson

William Donald Hewson 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).

  • Demulsification of industrial lubricants containing naphthenic basestocks
    Patent number: 6544937
    Abstract: A lubricating composition containing naphthenic basestocks has demulsification properties improved by the addition of a demulsification additive selected from oxyalkylated glycols, esters of oxyalkylated glycols and mixtures thereof.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: April 8, 2003
    Assignee: ExxonMobile Research and Engineering Company
    Inventors: William Donald Hewson, Terrence Edward Addley
  • DEMULSIFICATION OF INDUSTRIAL LUBRICANTS CONTAINING NAPHTHENIC BASESTOCKS
    Publication number: 20020193261
    Abstract: A lubricating composition containing naphthenic basestocks has demulsification properties improved by the addition of a demulsification additive selected from oxyalkylated glycols, esters of oxyalkylated glycols and mixtures thereof.
    Type: Application
    Filed: March 22, 2002
    Publication date: December 19, 2002
    Inventors: William Donald Hewson, Terrence Edward Addley
  • Emulsifiable cutting oil that minimizes graphite paste formation when cutting graphite containing metals
    Patent number: 6271183
    Abstract: An emulsifiable oil composition for machining graphite containing metals comprises a major amount of an oil of lubricating viscosity; at least one surfactant in an amount sufficient to render the oil emulsifiable in water; and, from about 0.8 vol % to about 3 vol % based on the total volume of the composition of an aliphatic alcohol having from 1 to about 8 carbon atoms.
    Type: Grant
    Filed: February 25, 2000
    Date of Patent: August 7, 2001
    Assignee: ExxonMobil Research and Engineering Company
    Inventor: William Donald Hewson
  • Petroleum quench oil
    Patent number: 6239082
    Abstract: Petroleum quench oils effective for high speed cooling of heated metals and metal hardening are disclosed. The petroleum quench oils contain natural or synthetic base oils having a minimum flash point of about 120° C. and a combination of poly(iso)alkylene and poly(iso)alkylene succinic anhydride or succinic acid. A method for cooling heated metal to harden it, improve the metallurgical consistency, improve machinability and reduce residue on quenched metal parts is also disclosed comprising quenching the heated metal part in a quench oil containing natural or synthetic base oils having a minimum flash point of about 120° C. and a combination of poly(iso)alkylene and poly(iso)alkylene succinic anhydride or succinic acid.
    Type: Grant
    Filed: April 3, 1998
    Date of Patent: May 29, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: William Donald Hewson, Gerald Keith Gerow
  • High performance metal working oil
    Patent number: 5958849
    Abstract: The present invention is a non-emulsifying, chlorine-free metal working or cutting oil which exhibits the same or superior performance as heretofore exhibited by chlorine containing fluids. The metal working oil contains cosulfurized olefins, polysulfurized hydrocarbon, phosphate esters, animal triglycerides, high molecular weight polyolefins in a mineral oil basestock. The oil may also contain metal deactivators, antioxidants and preservatives such as BHT, and mixtures of the above.
    Type: Grant
    Filed: January 3, 1997
    Date of Patent: September 28, 1999
    Assignee: Exxon Research and Engineering Co.
    Inventors: William Donald Hewson, Gerald Keith Gerow