Patents by Inventor Gwendyline Y. Y. T. Chen

Gwendyline Y. Y. T. Chen 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 making colored images using aqueous processable photosensitive elements
    Patent number: 5093221
    Abstract: A photosensitive element adapted for the preparation of colored images is disclosed. The photosensitive element comprises: a photosolubilizable layer consisting essentially of an acid-labile polymer and a photosolubilizing agent; an elastomeric layer; and a support. It can be processed by aqueous solvents, preferably ordinary tap water.
    Type: Grant
    Filed: August 5, 1991
    Date of Patent: March 3, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Gwendyline Y. Y. T. Chen, Floyd A. Raymond, Jeffrey J. Patricia, Walter R. Hertler
  • Aqueous processable photosensitive element with an elastomeric layer
    Patent number: 5071731
    Abstract: A photosensitive element adapted for the preparation of colored images is disclosed. The photosensitive element comprises: a photosolubilizable layer consisting essentially of an acid-labile polymer and a photosolubilizing agent; an elastomeric layer; and a support. It can be processed by aqueous solvents, preferably ordinary tap water.
    Type: Grant
    Filed: April 10, 1990
    Date of Patent: December 10, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Gwendyline Y. Y, T. Chen, Floyd A. Raymond, Jeffrey J. Patricia, Walter R. Hertler
  • Preparation of photosensitive block copolymer elements
    Patent number: 4423135
    Abstract: Photosensitive elements comprising a layer of a solvent-soluble, thermoplastic, elastomeric, block copolymer, a nongaseous ethylenically unsaturated compound, and an addition polymerization initiator activatable by actinic light interposed between a support and cover sheet, a flexible polymeric film, e.g., polyamide, being interposed between the cover sheet and the surface of the layer. The elements are useful in preparing printing plates, particularly flexographic printing plates, and other relief images.
    Type: Grant
    Filed: August 16, 1982
    Date of Patent: December 27, 1983
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventors: Gwendyline Y. Y. T. Chen, James F. Brennan
  • Process of producing an elastomeric printing relief
    Patent number: 4369246
    Abstract: Photosensitive elements comprising a layer of a solvent-soluble, thermoplastic, elastomeric, block copolymer, a nongaseous ethylenically unsaturated compound, and an addition polymerization initiator activatable by actinic light interposed between a support and cover sheet, a flexible polymeric film, e.g., polyamide, being interposed between the cover sheet and the surface of the layer. The elements are useful in preparing printing plates, particularly flexographic printing plates, and other relief images.
    Type: Grant
    Filed: January 28, 1981
    Date of Patent: January 18, 1983
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Gwendyline Y. Y. T. Chen, James F. Brennan
  • Use of cover sheet and interposed flexible film with block copolymer composition
    Patent number: 4323637
    Abstract: Photosensitive elements comprising a layer of a solvent-soluble, thermoplastic, elastomeric, block copolymer, a nongaseous ethylenically unsaturated compound, and an addition polymerization initiator activatable by actinic light interposed between a support and cover sheet, a flexible polymeric film, e.g., polyamide, being interposed between the cover sheet and the surface of the layer. The elements are useful in preparing printing plates, particularly flexographic printing plates, and other relief images.
    Type: Grant
    Filed: January 5, 1981
    Date of Patent: April 6, 1982
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Gwendyline Y. Y. T. Chen, James F. Brennan
  • Photosensitive block copolymer composition and elements
    Patent number: 4323636
    Abstract: Compatible photosensitive compositions, and elements made therefrom, comprising a solvent-soluble, thermoplastic, elastomeric, block copolymer, a nongaseous ethylenically unsaturated compound, and an addition polymerization initiator activatable by actinic light are useful in preparing printing plates, particularly flexographic printing plates, and other relief images.
    Type: Grant
    Filed: March 2, 1981
    Date of Patent: April 6, 1982
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Gwendyline Y. Y. T. Chen