Patents by Inventor Helen M. Redfearn

Helen M. Redfearn 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).

  • Process for the development of photographic materials
    Patent number: 5965334
    Abstract: A process for the development of an imagewise exposed photographic recording material containing more than 200 mg/m.sup.2 of silver comprises subjecting the photographic recording material to a development/amplification step using a developer/amplifier solution containing an oxidizing agent, and controlling the process temperature within the range of from 20 to 50.degree. C. and the process time between 5 and 20 seconds. After the development/amplification step, the photographic material can be immediately subjected to a bleach-fix step, and staining is avoided.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: October 12, 1999
    Assignee: Eastman Kodak Company
    Inventors: John R. Fyson, Helen M. Redfearn