Patents by Inventor Sydney N. Floersheim

Sydney N. Floersheim 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).

  • Dual purpose magnetic toner
    Patent number: 4345013
    Abstract: A free-flowing, non-spherical, fragmentary, toner particle is prepared by blending a mixture of thermoplastic resins with magnetic iron oxide. The dispersion is processed to a fine powder and dry blended with conductive carbon black which is anchored onto the surface of the particle by warm air or gas.
    Type: Grant
    Filed: February 28, 1977
    Date of Patent: August 17, 1982
    Assignee: Black Copy Company, Inc.
    Inventors: Arthur S. Diamond, Sydney N. Floersheim
  • Dual purpose electrophotographic magnetic toner and process of making
    Patent number: 4288519
    Abstract: A free-flowing, non-spherical, fragmentary, toner particle is prepared by blending a mixture of thermoplastic resins with magnetic iron oxide. The dispersion is processed to a fine powder and dry blended with conductive carbon black which is anchored onto the surface of the particle by warm air or gas.
    Type: Grant
    Filed: December 20, 1977
    Date of Patent: September 8, 1981
    Assignee: Black Copy Company, Inc.
    Inventors: Arthur S. Diamond, Sydney N. Floersheim