Patents by Inventor John A. Handforth

John A. Handforth 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).

  • Printing process and printing compositions
    Patent number: 4402262
    Abstract: Aqueous compositions, suitable for printing, are described which have a high volume solids content. They comprise primary polymer particles and a secondary polymer which provides temporary adherence of the particles to a substrate before the primary polymer is fused by a heating step, in a printing process, in order to cause permanent adherence. There are advantages over the use of organic solvent-based and other aqueous compositions, such as easier cleaning, low toxicity/fire hazard and lower cost.
    Type: Grant
    Filed: June 12, 1981
    Date of Patent: September 6, 1983
    Assignee: Imperial Chemical Industries PLC
    Inventor: John A. Handforth