Patents by Inventor Frans Clement

Frans Clement 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 and materials for thermoplastic recording
    Patent number: 4001026
    Abstract: A sheet material including in working relationship with a reducible silver salt a sterically hindered phenol derivative having the following structural formula: ##STR1##
    Type: Grant
    Filed: June 24, 1975
    Date of Patent: January 4, 1977
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Antoon Leon Vandenberghe, Frans Clement Heugebaert, Albert Lucien Poot
  • Manufacture of a planographic printing plate by making silver halide areas of emulsion oleophicic
    Patent number: 3989522
    Abstract: A method for the preparation of a planographic printing plate wherein a photoexposed and developed photographic material containing a pattern of poorly water-soluble silver salt is treated with an aqueous liquid which contains in dissolved state an organic cationic compound or mixture of organic cationic compounds, iodide ions, and a sufficient amount of hydronium ions (H.sub.3 O.sup.+) for creating an acidic medium, said liquid being capable of making an unexposed and undeveloped photographic silver halide material as defined in the disclosure sufficiently receptive for a lithographic ink.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: November 2, 1976
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Albert Lucien Poot, Jan Frans Van Besauw, Frans Clement
  • Photographic light-sensitive and heat developable material
    Patent number: 3933507
    Abstract: Heat developable light-sensitive photographic material having a layer which contains a light-sensitive combination of a silver compound substantially insensitive to light, a reducing agent for that silver compound and a polymethine sensitizer. The exposed material is heated so that the silver compound in the exposed areas is reduced and a visible silver image is formed.
    Type: Grant
    Filed: August 10, 1972
    Date of Patent: January 20, 1976
    Assignee: AGFA-Gevaert, A.G.
    Inventors: Anita VON Konig, Helmut Kampfer, Eric Maria Brinckmann, Frans Clement Heugebaert