Patents by Inventor Manfred A. J. Sondergeld

Manfred A. J. Sondergeld 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).

  • Process of forming imaged photohardened material
    Patent number: 4948704
    Abstract: A positively working, tonable, photohardenable mixture, as well as image-forming material prepared therefrom are described, which as essential components, contains a binder or mixture of binders, a photohardenable compound, a photoinitiator or an initiator system and a multivalent metal compound to improve the toning properties of the material.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: August 14, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Richard D. Bauer, Ursula A. Kraska, Manfred A. J. Sondergeld
  • Process to lower the viscosity of coating solutions for the production of light-sensitive reproduction materials
    Patent number: 4683190
    Abstract: Process for lowering the viscosity of coating solutions containing a thixotropy-causing filler for the production of light-sensitive reproduction materials by adding at least one compound corresponding to one of the following formulas: ##STR1## wherein R is a linear saturated or unsaturated hydrocarbon chain having 2 to 12 carbon atoms, optionally substituted in which one or more carbon atoms can be replaced by N(R.sub.5), O, S, and/or an aromatic radial, or a 5 to 8 membered aliphatic ring.R.sub.1 to R.sub.4 are H, alkyl, aryl, and aralkyl, whereby R.sub.1 to R.sub.4 can be the same or different;R.sub.5 is R.sub.1 to R.sub.4 ;R.sub.6 and R.sub.7 are R.sub.1 to R.sub.4, --(CHR.sub.8).sub.p --OH;p is 1 to 6;q and r are 1 to 6 and can be the same or different;R.sub.8 is H, alkyl;R.sub.9 and R.sub.10 are H, alkyl, --(CHR.sub.8).sub.p --OH.
    Type: Grant
    Filed: December 18, 1985
    Date of Patent: July 28, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Manfred A. J. Sondergeld, Dietmar Dudek, Klaus Hossner
  • Photopolymerizable mixture and recording material produced from it
    Patent number: 4604342
    Abstract: A photopolymerizable mixture is described which contains the following: a binding agent which is soluble or at least capable of swelling in aqueous-alkaline solutions, a photoinitiator or a photoinitiator system and at least one ethylenically unsaturated monomer, whereby at least one monomer contains an aromatic hydroxyl-, mercapto-, sulfonamide- or a mono-N-substituted sulfonamide group, or combinations thereof.
    Type: Grant
    Filed: March 13, 1985
    Date of Patent: August 5, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Manfred A. J. Sondergeld, Mario Grossa
  • Etching solution for etching of photopolymeric films
    Patent number: 4409115
    Abstract: Etching solution for dot etching photopolymerized materials which comprises an organic polymeric binder having alkali soluble groups, monomer and photoinitiator, the material having an optical density in the actinic region of at least 1.0, wherein a water-soluble salt of a water-insoluble polymeric polycarboxylic acid whose acid strength is the same or less than that of the binder is present as the etching agent.
    Type: Grant
    Filed: September 20, 1982
    Date of Patent: October 11, 1983
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventor: Manfred A. J. Sondergeld