Patents by Inventor Wolfgang Sauerteig

Wolfgang Sauerteig 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).

  • Color photographic recording material
    Patent number: 4788133
    Abstract: A recording material having improved sharpness and color reproduction contains as uppermost layer a green-sensitive silver chloride emulsion having a layered grain structure, the ratio of diameter to thickness of the silver halide grains being at most 5.
    Type: Grant
    Filed: February 17, 1987
    Date of Patent: November 29, 1988
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Wolfgang Sauerteig, Gunter Renner, Sieghart Klotzer, Jens-Peter Grimm
  • Color photographic recording material and development process
    Patent number: 4571378
    Abstract: Improved photographic recording materials containing at least one silver halide emulsion layer with comparatively high sensitivity and at least one silver halide emulsion layer with comparatively low sensitivity. Color couplers and DIR compounds of differing reactivities are associated with these layers.
    Type: Grant
    Filed: December 10, 1984
    Date of Patent: February 18, 1986
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Wolfgang Sauerteig, Erwin Ranz, Heinz Schutz
  • Photographic recording material with a precursor compound for a yellow mask
    Patent number: 4427763
    Abstract: A color photographic recording material, in which a precursor compound for a yellow mask coupler is contained in a green-sensitive layer or in a layer adjacent thereto and in which a blue-sensitive layer is arranged between this layer and the layer support, permits very good sharpness with satisfactory speed.
    Type: Grant
    Filed: August 30, 1982
    Date of Patent: January 24, 1984
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Joachim W. Lohmann, Gunter Renner, Wolfgang Sauerteig
  • Process for the production of matting layers
    Patent number: 4287299
    Abstract: For the production of matted outer layers of photographic silver halide recording materials particles of a copolymer of maleic acid anhydride and a C.sub.2 -C.sub.8 monoolefin are dispersed in an aqueous solution of a hydrophilic colloid and the dispersion thus formed is applied to one or both surfaces of the photographic recording material and the layer is dried.
    Type: Grant
    Filed: May 13, 1980
    Date of Patent: September 1, 1981
    Assignee: Agfa-Gevaert AG
    Inventors: Wolfgang Himmelmann, Rolf Bruck, Wolfgang Sauerteig, Peter Kruck, Gunter Kolb, Gunter Sackmann
  • Photosensitive photographic material containing a light-absorbing dye
    Patent number: 4276373
    Abstract: A photosensitive recording material containing at least one silver halide layer and an azo dye is disclosed.
    Type: Grant
    Filed: March 19, 1980
    Date of Patent: June 30, 1981
    Assignee: AGFA-Gevaert, A.G.
    Inventors: Hans Ohlschlager, Lothar Rosenhahn, Wolfgang Sauerteig
  • Process for the hardening of photographic layers utilizing fast acting hardener and polysaccharide
    Patent number: 4233398
    Abstract: Protein containing photographic layers are hardened by coating with a hardening solution which contains at least one quick-acting hardener which activates carboxyl groups and at least one polysaccharide.
    Type: Grant
    Filed: February 24, 1978
    Date of Patent: November 11, 1980
    Assignee: AGFA-Gevaert, A.G.
    Inventors: Fritz Nittel, Karl Czernik, Wolfgang Sauerteig, Wolfgang Himmelmann, Peter Bergthaller
  • Process for hardening photographic layers containing gelatine
    Patent number: 4119464
    Abstract: In a process for hardening gelatine containing photographic layers, in particular multilayered photographic films, using conventional hardeners and quick acting hardeners, the surface of a layer which contains gelatine and complex forming organic or inorganic salts is exposed to the action of an aqueous solution containing a wetting agent and a quick acting hardener, the quantity of water applied with the solution being calculated so that the layer or multilayered film undergoes swelling to a certain extend, and the degree of swelling is maintained for a period from 10 to 200 seconds, whereupon the layer or multilayered film is dried at a temperature below 30.degree. C.
    Type: Grant
    Filed: May 31, 1977
    Date of Patent: October 10, 1978
    Assignee: AGFA-Gevaert Aktiengesellschaft
    Inventors: Wolfgang Sauerteig, Wolfgang Himmelmann, Rudolf Meyer, Erwin Ranz, Willibald Pelz
  • Process for hardening silver halide containing photographic layers with sulpho- or sulphoalkyl-substituted carbamoyl pyridinium compounds
    Patent number: 4063952
    Abstract: In a process for hardening photographic protein containing layers as quick acting hardener a carbamoyl pyridinium compound is used the pyridine ring of which carries a sulfoalkyl substituent.
    Type: Grant
    Filed: August 12, 1975
    Date of Patent: December 20, 1977
    Assignee: AGFA-Gevaert Aktiengesellschaft
    Inventors: Wolfgang Himmelmann, Johannes Sobek, Wolfgang Sauerteig
  • Process of hardening a silver halide photographic material with a 1-carbamoyloxypyridinium salt
    Patent number: 4055427
    Abstract: As quick-acting hardeners for layers which contain protein, in particular gelatin layers for photographic purposes carbamoyl oxypyridinium salts are used.
    Type: Grant
    Filed: February 15, 1977
    Date of Patent: October 25, 1977
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Peter Bergthaller, Wolfgang Himmelmann, Wolfgang Sauerteig, Lothar Rosenhahn