Patents by Inventor Guunther Matschke

Guunther Matschke 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).

  • Photographic material containing a temporary barrier layer applied from an organic solution
    Patent number: 4379829
    Abstract: A color photographic material for the dye diffusion transfer process contains a temporary barrier layer that is applied from organic solution and consists of a mixture of(a) 40 to 95% by weight of a copolymer of 40 to 80% by weight of monomer I (vinylidene chloride, dimethyl butadiene or dichlorobutadiene) 18 to 50% by weight of monomer II ((meth)acrylonitrile or alkyl (meth)acrylate) and 2 to 10% by weight of monomer III (olefinically unsaturated copolymerizable mono or dicarboxylic acids, sulfonic acids or phosphonic acids) and(b) 5 to 60% by weight of a homopolymer of alkyl acrylate, hydroxyalkyl acrylate, N-alkyl acrylamide, N-hydroxyalkyl acrylamide vinyl acetate, or polycarbonate or cellulose acetate, or a copolymer of 80 to 99% by weight of alkyl or hydroxyalkyl acrylate and 1 to 20% by weight of a copolymerizable acid.
    Type: Grant
    Filed: January 2, 1981
    Date of Patent: April 12, 1983
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Werner Krafft, Gunter Helling, Guunther Matschke, Immo Boie