Patents by Inventor John Kynaston Davies

John Kynaston Davies 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).

  • Photoactive materials applicable to imaging systems
    Patent number: 6384264
    Abstract: Organic photoprecursors of amines are provided for use in photosensitive imaging systems, finding particular application in the preparation of lithographic printing plates. Said photoprecursors generate free amines on exposure to long wavelength UV or visible radiation, have high solubility in organic solvents, and include photolabile 2-nitrobenzyl functional groups. Methods for the synthesis of the photoprecursors are described, and the use of the said photoprecursors for the production of printing plates using both positive working and negative working techniques are discussed.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: May 7, 2002
    Assignee: Agfa-Gevaert
    Inventors: Maria de Lurdes dos Santos Cristiano, John Kynaston Davies, Sharon Dowd, Robert Alexander Walker Johnstone, Michael John Pratt, John Robert Wade
  • Recording material having a pigment-colored radiation-sensitive layer
    Patent number: 6197472
    Abstract: The present invention relates to a recording material having a substrate and a negative-working, radiation-sensitive layer which contains a diazonium salt, metal-free colored pigments dispersed in an organic polymeric binder, transparent spacer pigments having a pore volume of more than 1.0 ml/g and a polymeric binder. The predispersal of the colored pigments is achieved by milling with an organic polymeric binder containing hydroxyl groups, some or all of which have been reacted with a di- or polycarboxylic anhydride so that the binder has an acid number of from 20 to 200. Printing plates in which the printing parts have a clearly visible contrast relative to the substrate can be produced from the recording material.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: March 6, 2001
    Assignee: Afga-Gevaert N.V.
    Inventors: Klaus-Peter Konrad, Andreas Elsaesser, Frank Fischer, John Kynaston Davies
  • Photoactive materials applicable to imaging systems
    Patent number: 6171756
    Abstract: Organic photoprecursors of amines are provided for use in photosensitive imaging systems, finding particular application in the preparation of lithographic printing plates. Said photoprecursors generate free amines on exposure to long wavelength UV or visible radiation, have high solubility in organic solvents, and include photolabile 2-nitrobenzyl functional groups. Methods for the synthesis of the photoprecursors are described, and the use of the said photoprecursors for the production of printing plates using both positive working and negative working techniques are discussed.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: January 9, 2001
    Assignee: Afga-Gevaert, N.V.
    Inventors: Maria de Lurdes dos Santos Cristiano, John Kynaston Davies, Sharon Dowd, Robert Alexander Walker Johnstone, Michael John Pratt, John Robert Wade