Patents by Inventor George F. Van Veelen

George F. Van Veelen 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).

  • Hardening solution for proteinaceous materials
    Patent number: 4216108
    Abstract: A proteinaceous material such as gelatin is hardened by treatment with an aqueous solution of a partial hydrolysis product of cyanuric chloride that has been buffered with a water-soluble borate, e.g. sodium metaborate, potassium metaborate or ammonium metaborate.The proteinaceous material can be a proteinaceous coating such as a photographic silver halide emulsion layer, a backing layer, a protective layer, a filter layer or any other photographic auxiliary layer.
    Type: Grant
    Filed: March 27, 1979
    Date of Patent: August 5, 1980
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Francis J. Sels, Hendrik E. Kokelenberg, George F. van Veelen
  • Photographic bleach compositions containing bleach-accelerating compounds
    Patent number: 4201585
    Abstract: The processing of exposed photographic silver halide color materials is described while using a bleach or bleach-fixing bath containing better bleach-accelerating compounds. The bleach-accelerating compounds are polyoxyethylene compounds comprising at least 20 mol % of recurring oxyethylene units, which carry a thioether group in a sidechain.
    Type: Grant
    Filed: October 17, 1978
    Date of Patent: May 6, 1980
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Robert J. Pollet, Camille A. Vandeputte, Francis J. Sels, George F. van Veelen
  • Hardening proteinaceous materials
    Patent number: 4187114
    Abstract: Proteinaceous material such as gelatin is hardened by treatment with an aqueous solution of the partial hydrolysis product of a 2,4-dichloro-6-alkoxy-S-triazine with a water-soluble tertiary phosphate and/or a water-soluble borate, wherein the 2,4-dichloro-6-alkoxy-s-triazine corresponds to the formula: ##STR1## wherein R is a lower alkyl or alkoxyalkyl group. The proteinaceous material can be a proteinaceous coating such as a photographic silver halide emulsion layer, a backing layer, a protective layer, a filter layer, or any other photographic auxiliary layer.
    Type: Grant
    Filed: May 9, 1978
    Date of Patent: February 5, 1980
    Assignee: AGFA-Gevaert N.V.
    Inventors: Hendrik E. Kokelenberg, Francis J. Sels, George F. Van Veelen
  • Hardening of proteinaceous materials
    Patent number: 4181529
    Abstract: A proteinaceous material such as gelatin is hardened by treatment with an aqueous solution of a partial hydrolysis product of cyanuric chloride that has been buffered with a water-soluble borate, e.g. sodium metaborate, potassium metaborate or ammonium metaborate.The proteinaceous material can be a proteinaceous coating such as a photographic silver halide emulsion layer, a backing layer, a protective layer, a filter layer or any other photographic auxiliary layer.
    Type: Grant
    Filed: May 9, 1978
    Date of Patent: January 1, 1980
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Francis J. Sels, Hendrik E. Kokelenberg, George F. Van Veelen
  • Photographic silver halide color material containing fast-acting hardener and 2-pyrazolin-5-one coupler precursors
    Patent number: 4123281
    Abstract: Color photographic material containing a fast-acting hardener, which acts by activating carboxyl groups, wherein said material contains a 2-pyrazolin-5-one coupler precursor corresponding to one of the following general formulae I or II: ##STR1## wherein EACH OF R.sup.1, R and Y are substituents of the type used in 2-pyrazolin-5-one color couplers, andZ represents acyl, alkoxycarbonyl, aryloxycarbonyl,Or ##STR2## in which R.sup.1, R, and Y have the above-defined significance, and A represents an alkylene group or an arylene group.
    Type: Grant
    Filed: August 17, 1976
    Date of Patent: October 31, 1978
    Assignee: Agfa-Gevaert N.V.
    Inventors: Marcel J. Monbaliu, Hans-Heinrich Credner, Wolfgang Himmelmann, Ernst Meier, Gaston J. Benoy, Raphael K. Van Poucke, Karl-Wilhelm Schranz, George F. Van Veelen