Patents by Inventor James Riesenfeld

James Riesenfeld 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: 4732831
    Abstract: Xeroprinting process involving imagewise exposing a photopolymer master, charging on a conductive support, toning with dry or liquid electrostatic toner, and transferring to another surface. Photopolymer systems comprising preferred combinations of polymeric binders, ethylenically unsaturated monomers. HABI initiators and chain transfer agents.
    Type: Grant
    Filed: June 1, 1987
    Date of Patent: March 22, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: James Riesenfeld, William Bindloss, Graciella Blanchet, Rolf Dessauer, Alan S. Dubin
  • Patent number: 4546815
    Abstract: An apparatus and method for permitting long-term continuous casting provides a plurality of orifices. By temporarily casting simultaneously from two adjacent orifices, it becomes possible to replace orifices without interrupting the casting process. Thus, the duration of continuous casting is not limited by the useful lifetime of a single casting orifice. Among the applications of the invention is the long-term continuous casting of metallic ribbon, such as amorphous metal ribbon.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: October 15, 1985
    Assignee: Allied Corporation
    Inventors: Howard H. Liebermann, James Riesenfeld
  • Patent number: 4292394
    Abstract: Process for preparation of multicolor images on a single negative-working photosensitive layer which comprises imagewise exposing the layer through a transparency to form tacky image areas; toning the tacky image areas with a toner which becomes swollen or solubilized upon contact with the tacky areas; buffing or rubbing the toned image areas until glossy; and repeating the exposing, toning and buffing or rubbing using a different image-bearing transparency and appropriate toner. The process is useful in preparing multicolor proofs, e.g., maps, textile and wall covering design proofs and samples, etc.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: September 29, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Victor F. H. Chu, James Riesenfeld