Patents by Inventor Armin Voigt

Armin Voigt 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 for the production of color images
    Patent number: 5374505
    Abstract: A color photographic recording material containing, on a layer support, at least one blue sensitive silver halide emulsion layer and a yellow coupler associated therewith, at least one green sensitive silver halide emulsion layer and a magenta coupler associated therewith and at least one red sensitive silver halide emulsion layer and a cyan coupler associated therewith also contains, in a layer which is not sensitive to light, a compound corresponding to formula I (stabilizer) ##STR1## wherein R.sup.1 denotes H or a group which can be split off under alkaline development conditions;R.sup.2 denotes H, halogen, OH, an alkyl having 1 to 4 carbon atoms, an alkoxy having 1 to 4 carbon atoms, COOR.sup.3, CONR.sup.4 R.sup.5, SO.sub.2 NR.sup.4 R.sup.5, NH--COR.sup.3, NH--SO.sub.2 --R.sup.3 or NH--CO--NHR.sup.4 ;R.sup.3 denotes an alkyl having 1 to 4 carbon atoms,R.sup.4 and R.sup.5 denote H or a group such as R.sup.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: December 20, 1994
    Assignee: Agfa-Gevaert AG
    Inventors: Jurgen Heinecke, Helmut Mader, Fritz Nittel, Hans hlschlager, Armin Voigt
  • Photographic silver halide material containing an antistatic layer
    Patent number: 4582783
    Abstract: An antistatic layer applied to the back of the photographic material contains (A) a mixture of sodium magnesium silicate and the sodium salt of polystyrene sulphonic acid and (B) a succinic acid semi-ester compound. The antistatic layer is distinguished by high abrasion resistance and its good qualities as writing and printing surface.
    Type: Grant
    Filed: April 26, 1985
    Date of Patent: April 15, 1986
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Fritz Nittel, Bert Sauter, Armin Voigt
  • Photographic material containing a stabilizing agent
    Patent number: 4277557
    Abstract: Propyne compounds, which are capable of stabilizing photographic materials against fog, color fog and flattening of the gradation are disclosed. They may be added to emulsion layers and to processing baths.
    Type: Grant
    Filed: December 11, 1978
    Date of Patent: July 7, 1981
    Assignee: AGFA-Gevaert, A.G.
    Inventors: Gerhard Jager, Anita von Konig, Werner Liebe, Armin Voigt
  • Photographic material containing a stabilizer
    Patent number: 4256830
    Abstract: Propyne compounds, which are capable of stabilizing photographic materials against color fog and flattening of the gradation are disclosed. They may be added to emulsion layers and to processing baths.
    Type: Grant
    Filed: November 16, 1978
    Date of Patent: March 17, 1981
    Assignee: AGFA-Gevaert, A.G.
    Inventors: Gerhard Jager, Anita von Konig, Armin Voigt, Karl H. Buchel
  • Photographic material containing a stabilizer
    Patent number: RE31514
    Abstract: Propyne compounds, which are capable of stabilizing photographic materials against color fog and flattening of the gradation are disclosed. They may be added to emulsion layers and to processing baths.
    Type: Grant
    Filed: August 4, 1982
    Date of Patent: January 31, 1984
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Gerhard Jager, Anita von Konig, Armin Voigt, Karl H. Buchel