Patents by Inventor Jean-Claude Marckmann

Jean-Claude Marckmann 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).

  • Process of transferring monocomponent developing powder with a volatile, dielectric liquid
    Patent number: 4373016
    Abstract: This invention provides a process of electrographic reproduction onto an arbitary support, whereby an image of a magnetic, monocomponent developing powder is transferred, under the influence of electrical means, onto a support covered with a thin layer of volatile dielectric liquid having a volume resistivity greater than 10.sup.3 ohm-cm.sup.2 /cm.
    Type: Grant
    Filed: May 12, 1981
    Date of Patent: February 8, 1983
    Assignee: Rhone-Poulenc Systemes
    Inventors: Donald H. M. Kings, Jean-Claude Marckmann, Pham K. Quang
  • Electrostatic charge image transfer
    Patent number: 4115114
    Abstract: A system for electrostatic reproduction in which a carrier surface is charged with an image, the image-charged surface is presented adjacent a receiving surface, and a liquid or powder developer is selectively charged and is presented between the image-charged surface and the receiving surface to produce a developed image on the receiving surface.
    Type: Grant
    Filed: September 14, 1973
    Date of Patent: September 19, 1978
    Assignee: La Cellophane
    Inventors: Pham Kim Quang, Jean-Claude Marckmann