Patents by Inventor Paul S. Greenfield

Paul S. Greenfield 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).

  • Metal hydroxide desiccated emulsions used to prepare grease
    Patent number: 7691795
    Abstract: The invention provides a grease composition comprising a stable dispersion of a metal hydroxide with a number average particle size in the range 20 nanometres to 2 micrometres, a surfactant with a HLB of less than 10, a mono- or poly-carboxylic acid, and an oil of lubricating viscosity. The method of preparing a grease composition is also disclosed with benefits including a reduction in reaction time, amount of foam produced and environmental hazards.
    Type: Grant
    Filed: August 14, 2003
    Date of Patent: April 6, 2010
    Assignee: The Lubrizol Corporation
    Inventors: Stephen J. Nolan, Carl F. Kernizan, Paul S. Greenfield, Claire L. Hollingshurst