Patents by Inventor Donald William Edwards

Donald William Edwards 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: 4117498
    Abstract: Magnetic printing process, and apparatus for carrying out same, comprising:(a) forming a magnetic image on a ferromagnetic material which is imposed on an electrically conductive support;(b) developing the magnetic image by decorating same with a ferromagnetic toner comprising a ferromagnetic component, a dye and/or chemical treating agent and a water-soluble or water-solubilizable, preferably thermoplastic, resin which substantially encapsulates the ferromagnetic component and the dye and/or treating agent;(c) transferring the developed image to a substrate;(d) permanently fixing the dye and/or chemical treating agent of the image on the substrate; and(e) removing the ferromagnetic component and the resin from the image on the substrate.
    Type: Grant
    Filed: February 25, 1977
    Date of Patent: September 26, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Donald William Edwards, Emery John Gorondy
  • Patent number: 4099186
    Abstract: Magnetic printing process, and apparatus for carrying out same, comrpising:A. forming a magnetic image on a ferromagnetic material which is imposed on an electrically conductive support and subjecting the ferromagnetic material to the action of a charge dissipating means;B. developing the magnetic image by decorating same with a ferromagnetic toner comprising a ferromagnetic component, a dye and/or chemical treating agent and a water-soluble or water-solubilizable, preferably thermoplastic, resin which substantially encapsulates the ferromagnetic component and the dye and/or treating agent;C. transferring the developed image to a substrate;D. permanently fixing the dye and/or chemical treating agent of the image on the substrate; andE. removing the ferromagnetic component and the resin from the image on the substrate.
    Type: Grant
    Filed: February 25, 1977
    Date of Patent: July 4, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Donald William Edwards, Emery John Gorondy, Arend Van Roggen
  • Patent number: RE36372
    Abstract: An elongated pile article having a support strand for attachment to a plurality of yarn bundles, the yarn bundles including a dense portion with the filaments bonded to each other and bonded to the support strand, pile surface structure comprised of a plurality of elongated pile articles placed one next to the other, and a method and apparatus for making the elongated pile article.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: November 2, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Donald William Edwards, James Kenton Odle, Peter Popper, Donald Montgomery Sadler, Harold Francis Staunton, William Charles Walker, Paul Wesley Yngve, Todd James Savidge