Patents by Inventor William J. Frair

William J. Frair 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).

  • Refiner disk
    Patent number: 4005827
    Abstract: A disk segment for use in a pulp refiner whereby a first portion of a side edge of the disk is offset relative to a second portion of the same side edge. The cooperating adjacent segment has substantially mating offset edges which cooperate with the adjacent segment in an overlapping and spaced apart relation.
    Type: Grant
    Filed: April 30, 1975
    Date of Patent: February 1, 1977
    Assignee: Beloit Corporation
    Inventors: William J. Frair, Robert P. Langdon