Patents by Inventor Frank W. Knight

Frank W. Knight 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).

  • Film processing cassette containing means for absorbing excess film processing fluid
    Patent number: 4139284
    Abstract: A photographic system for processing and viewing film contained in a cassette with a processor for applying processing fluid to the film strip having valve means to seal the processor at the conclusion of fluid application. An absorbing pad is positioned on the film strip to absorb any excess fluid deposited on the film prior to complete sealing of the applicator system.
    Type: Grant
    Filed: April 26, 1977
    Date of Patent: February 13, 1979
    Assignee: Polaroid Corporation
    Inventors: Joseph A. Stella, Frank W. Knight