Patents by Inventor Willard R. Pratt

Willard R. Pratt 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).

  • Patent number: 3984214
    Abstract: A diamond abrasive article preferably in the form of a grinding wheel, the work-contacting portion of which has a resinoid body containing metal coated diamond particles and also containing powdered metal of two kinds, one of the powdered metals having a relatively low melting point and the other having a substantially higher melting point, such as tin and copper, respectively.
    Type: Grant
    Filed: April 23, 1975
    Date of Patent: October 5, 1976
    Assignee: Federal-Mogul Corporation
    Inventors: Willard R. Pratt, John H. Hawkes