Patents by Inventor Heinz-Dieter Schutz

Heinz-Dieter Schutz 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: 5702877
    Abstract: A colour photographic silver halide material with a support, at least one silver halide emulsion layer and at least one non-light sensitive layer applied thereto, wherein the silver halide emulsion layer contains at least one colour coupler, and wherein the silver halide emulsion layer or the non-light sensitive layer contains a compound of the formula (I) ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 mean hydrogen or an organic residue andn means 0 or an integer from 1 to 4 orR.sub.1 and R.sub.2 together, R.sub.1 and an adjacent residue R.sub.3 together or two adjacent residues R.sub.3 together form a carbocyclic or heterocyclic ring with 5 to 7 ring atoms orR.sub.1, R.sub.2 or R.sub.3 mean a bridging member by means of which two compounds of the formula (I) are attached together orR.sub.1, R.sub.2 or R.sub.3 are attached to a polymer via a bridging member,wherein at least one of the substituents R.sub.1, R.sub.2 and R.sub.3 is an organic residue,is distinguished by improved grain.
    Type: Grant
    Filed: February 26, 1996
    Date of Patent: December 30, 1997
    Assignee: Agfa-Gevaert AG
    Inventors: Heinrich Odenwalder, Hans Langen, Uwe Dahlhaus, Heinz-Dieter Schutz
  • Patent number: 4710454
    Abstract: Photographic recording materials with improved processing stability are obtained by incorporating at least one phosphonic acid and at least one polyacrylic derivative.
    Type: Grant
    Filed: January 6, 1986
    Date of Patent: December 1, 1987
    Inventors: Hans Langen, Heinz-Dieter Schutz, Ubbo Wernicke, Wolfgang Himmelmann, Gunter Renner
  • Patent number: 4369248
    Abstract: A photographic recording material contains in a silver halide layer an emulsion mixture of at least one light sensitive silver halide and a comparatively non-light sensitive silver salt and in a second layer, which is in waterpermeable arrangement, an antifogging agent or a precursor compound thereof.
    Type: Grant
    Filed: May 20, 1981
    Date of Patent: January 18, 1983
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Erwin Ranz, Heinz-Dieter Schutz, Joachim W. Lohmann
  • Patent number: 4315070
    Abstract: In high sensitivity color photographic recording materials the undesired color fog density is reduced by highly reactive DIR-compounds having an effective reaction velocity constant k.sub.eff of more than 20,000 [1 . mole.sup.-1 . sec.sup.-1 ] (measured at pH 10.2 by the method described hereinafter) in a concentration of from 10.sup.-5 to 10.sup.-3 mole per mole of silver halide, if contained in a light-sensitive silver halide emulsion layer or in a concentration of from 10.sup.-7 to 10.sup.-5 mole per gram of solids if contained in a silver-halide-free binder layer adjacent to a silver halide emulsion layer.
    Type: Grant
    Filed: June 12, 1980
    Date of Patent: February 9, 1982
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Erwin Ranz, Joachim W. Lohmann, Heinz-Dieter Schutz
  • Patent number: 4173479
    Abstract: Improved sensitivity and improved interimage effects are obtained in a multilayer color-photographic recording material having two red-sensitive, two green-sensitive and a blue-sensitive silver halide emulsion layer as well as a yellow filter layer, the more sensitive red-sensitive and the more sensitive green-sensitive layers forming a comparatively more sensitive layer unit arranged further away from the support than each of the less sensitive green-sensitive and the less sensitive red-sensitive layer but nearer to the support than the yellow filter layer underneath the blue-sensitive layer; an additional chloride-containing silver halide emulsion layer of comparatively low sensitivity containing a non-diffusible DIR compound of low reactivity is arranged within the comparatively more sensitive layer unit between the red-sensitive and the green-sensitive layers.
    Type: Grant
    Filed: January 31, 1978
    Date of Patent: November 6, 1979
    Assignee: AGFA-Gevaert, A.G.
    Inventors: Erwin Ranz, Joachim W. Lohmann, Heinz-Dieter Schutz