Patents by Inventor Ronald J. Stacey

Ronald J. Stacey 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).

  • Recording materials
    Patent number: 4363866
    Abstract: Process for forming a vesicular image utilizing a vesicular recording material having an imaging layer which includes a defined sulphone and/or sulphonamide additive in an amount of 1 to 100% by weight based upon the weight of a polymeric component of the plastics vehicle. The additive provides improved image density and a back-appearing image.
    Type: Grant
    Filed: April 14, 1981
    Date of Patent: December 14, 1982
    Assignee: Bedford Limited
    Inventors: Stuart C. Rennison, Ronald J. Stacey
  • Recording materials for vesicular imaging
    Patent number: 4219616
    Abstract: Vesicular recording materials incorporate a sensitized layer comprising, as vehicle for the sensitizing agent, a quaternized polyelectrolyte, e.g. preferably polymers of dimethylamino ethyl methacrylate. The water sensitivity of the preferred polymers is reduced by copolymerisation with insolubilizing comonomers such as itaconic acid.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: August 26, 1980
    Assignee: Imperial Chemical Industries Limited
    Inventors: John A. Pope, Stuart C. Rennison, Ronald J. Stacey