Patents by Inventor Ester C. Caldwell, executor

Ester C. Caldwell, executor 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).

  • Dry processable copper halide photosensitive system
    Patent number: 5236813
    Abstract: A photosensitive element for the preparation of high quality images using an entirely dry process is provided. The photosensitive portion of this element is prepared from the anode product of an electrolysis of copper in an acid halide bath. Preferably, this material is cuprous halide. The element is then sensitized with an ascorbic acid-containing solution and given an image-wise exposure in actinic or visible light. The image is then developed by giving the element an over-all exposure to monochromatic light of about 5800 angstroms. A high quality, full dry image with good quality and shelf-life is obtained.
    Type: Grant
    Filed: April 17, 1992
    Date of Patent: August 17, 1993
    Assignee: Action Exploration Services
    Inventors: Ray S. Caldwell, deceased, Ester C. Caldwell, executor