Patents by Inventor David Blackburn

David 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).

  • Method for dyeing acrylonitrile polymer and copolymer fibres
    Patent number: 4266940
    Abstract: There is disclosed a process for the coloration of wet spun acrylic and modacrylic fibres in the gel form which comprises using a cationic dye, or its dye bases, which are substantially insoluble in water but soluble or partly soluble in organic solvents. There are also disclosed acrylic fibres so colored.
    Type: Grant
    Filed: March 2, 1979
    Date of Patent: May 12, 1981
    Assignee: Yorkshire Chemicals Limited
    Inventors: David Blackburn, Malcolm S. Wild