Patents by Inventor John Bryce Blackburn

John Bryce Blackburn 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).

  • Pigment compositions
    Patent number: 6007612
    Abstract: The present invention provides the use of a resinated pigment in which from 10 to 100% of the resinated proportion of the product is a resin ester, as colourant in a lithographic printing ink.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: December 28, 1999
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Paul Kerwin, David McGregor, John Bryce Blackburn
  • Pigment preparation
    Patent number: 4089699
    Abstract: A pigment composition comprising pigment and at least 5% by weight based on the weight of composition of a complex formed from one or more non ionic polyether surfactants based on ethylene oxide and a polymeric carboxylic acid having a molecular weight of at least 1500.
    Type: Grant
    Filed: October 21, 1975
    Date of Patent: May 16, 1978
    Assignee: Ciba-Geigy Corporation
    Inventors: John Bryce Blackburn, Arnold William Field