Patents by Inventor Gwilym I. Williams

Gwilym I. Williams 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).

  • Abrasion testing
    Patent number: 4305278
    Abstract: Abrasion testing, and hence particle content of fluids including liquids and gases is carried out by abrading a thin film 25 of an electrical conductor with the fluid, and measuring the resulting change in electrical resistance of the film.The method can be used to monitor metal particles in oil, and hence the state of wear of oil-lubricated metal parts, and the level of particulate pollution in the atmosphere.
    Type: Grant
    Filed: March 10, 1980
    Date of Patent: December 15, 1981
    Assignee: Fulmer Research Institute Limited
    Inventors: Duncan Stewart, Gwilym I. Williams, David A. Cash, Nicholas D. Anstey