Patents by Inventor Raymond J. Hoffman

Raymond J. Hoffman 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).

  • Method of applying a wearing surface
    Patent number: 4018944
    Abstract: A method of on-the-job installation of a coating having high resistance to wear caused by impact, abrasion, erosion and corrosion and a composition for use in performing the method. The method includes the preparation of a trowelable composition containing high alumina ceramic particles and a co-abrasive filler of smaller particles of inorganic and/or metallic origin in a polymer matrix and the application of this material to the surface to be repaired or protected.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: April 19, 1977
    Assignee: Rexnord Inc.
    Inventors: James R. Hallstrom, Raymond J. Hoffman, Ronald L. Walling
  • Wearing composition
    Patent number: 3954694
    Abstract: This is concerned with the coating or composition for use as a coating to be applied to surfaces subjected to wear to increase the life of the surface by resisting excessive wear thereon where the surface is subjected to a high abrasion or an abrasive atmosphere. The coating is intended to be trowelable, meaning that it can be applied with a trowel or any similar tool or instrumentality which enables it to be applied at the site or on the job.
    Type: Grant
    Filed: February 3, 1975
    Date of Patent: May 4, 1976
    Assignee: Rexnord, Inc.
    Inventors: James R. Hallstrom, Raymond J. Hoffman, Ronald L. Walling
  • Method of applying a wearing surface
    Patent number: RE30691
    Abstract: A method of on-the-job installation of a coating having high resistance to wear caused by impact, abrasion, erosion and corrosion and a composition for use in performing the method. The method includes the preparation of a trowelable composition containing high alumina ceramic particles and a co-abrasive filler of smaller particles of inorganic and/or metallic origin in a polymer matrix and the application of this material to the surface to be repaired or protected.
    Type: Grant
    Filed: August 28, 1980
    Date of Patent: July 28, 1981
    Inventors: James R. Hallstrom, Raymond J. Hoffman, Ronald L. Walling