Patents by Inventor Richard H. Martens

Richard H. Martens 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).

  • Instant processing film unit with internal dark slide and light seal
    Patent number: 4148650
    Abstract: A preregistered, instant-processing film unit including an internal dark slide removeable from an end section of the unit and a light seal for preventing daylight fogging of the unit from said end section. The film unit includes a photosensitive element for recording a processable latent image. A cover sheet is connected to the photosensitive element and the dark slide is removeably positioned between the element and sheet. The light seal includes a strip coupled to the photosensitive element and folded into the dark slide so that the strip is released by the act of removing the dark slide.
    Type: Grant
    Filed: September 19, 1977
    Date of Patent: April 10, 1979
    Assignee: Eastman Kodak Company
    Inventors: Richard H. Martens, Charles J. Simpson