Patents by Inventor Ursula Annerose Kraska

Ursula Annerose Kraska 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).

  • Developer and process for preparing flexographic printing forms
    Patent number: 6537731
    Abstract: An aqueous developer for photopolymerizable, flexographic printing plates containing an ethylenediamine triacetate-N-alkylacetamide having a long-chain aliphatic hydrocarbon radical in the N-alkylamido group and a process for preparing flexographic printing forms by the use of this developer are described.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: March 25, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Ursula Annerose Kraska, Ute Erika Hirse
  • Developer and process for preparing flexographic printing forms
    Patent number: 6506542
    Abstract: An aqueous developer for photopolymerizable flexographic printing plates containing a combination of an amino alcohol and/or an amino carboxylic acid and a surfactant or a combination of two surfactants and a process for preparing flexographic printing forms by the use of this developer are described.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: January 14, 2003
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Ursula Annerose Kraska, Rudolf Leonard Osowski
  • Monochrome and polychrome color proofs with low optical dot growth and a process and means for their preparation
    Patent number: 6083608
    Abstract: Monochrome and polychrome color proofs, for the graphic arts industry, having an image carrier containing two layers A and B to control optical dot growth are described. Layer A contains at least one polyolefin and, in a preferred embodiment, a light-reflecting white pigment. Layer B contains at least one binder, at least one light-reflecting white pigment at between 50% and 90% by weight relative to Layer B, and at least one light-absorbing pigment. A process and a means for preparing such monochrome and polychrome color proofs are described.
    Type: Grant
    Filed: November 7, 1997
    Date of Patent: July 4, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Bernhard Metzger, Ursula Annerose Kraska, Mario Grossa
  • Monochrome and polychrome color proofs with low optical dot growth and a process and means for their preparation
    Patent number: 5712025
    Abstract: Monochrome and polychrome color proofs, for the graphic arts industry, having an image carrier containing two layers A and B to control optical dot growth are described. Layer A contains at least one polyolefin and, in a preferred embodiment, a light-reflecting white pigment. Layer B contains at least one binder, at least one light-reflecting white pigment at between 50% and 90% by weight relative to Layer B, and at least one light-absorbing pigment. A process and a means for preparing such monochrome and polychrome color proofs are described.
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: January 27, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Bernhard Metzger, Ursula Annerose Kraska, Mario Grossa