Patents by Inventor Terence W. Baldock

Terence W. Baldock 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).

  • Negative-acting thermographic materials
    Patent number: 5306686
    Abstract: A negative-acting, photothermographic material having a first layer comprising an amine compound and a second layer comprising an amine-reactive dye which undergoes a visible change when in reactive association with the amine compound. The amine compound and the amine-sensitive dye are in non-reactive association at ambient and moderate temperatures, but at elevated temperatures the two components are able to interact to produce a visible change in the heated areas of the material. The materials are particularly suitable for the preparation of overhead projector transparencies.
    Type: Grant
    Filed: May 4, 1992
    Date of Patent: April 26, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ranjan C. Patel, John H. A. Stibbard, Darren Cooper, Terence W. Baldock, Donald J. Newman, John J. Stofko
  • Diffusion or sublimation transfer imaging system
    Patent number: 4632895
    Abstract: Images can be formed on a receptor sheet by transfer of a dye image. The positive dye image is formed by bleaching of dye with an iodonium ion. The positive dye image is then transferred by sublimation or diffusion onto a receptor sheet.
    Type: Grant
    Filed: August 21, 1985
    Date of Patent: December 30, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Ranjana C. Patel, John H. A. Stibbard, Michael G. Fisher, Terence W. Baldock