Patents by Inventor Raymond Leopold Florens

Raymond Leopold Florens 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).

  • Photographic multilayer direct-positive silver halide element
    Patent number: 3963494
    Abstract: A photographic multilayer direct-positive silver halide element is provided comprising at least two direct-positive fogged silver halide emulsion layers the undermost emulsion layer comprising one or more non-spectrally sensitizing electron acceptors and the uppermost emulsion layer comprising one or more electron-acceptors at least one of which is a spectrally sensitizing electron acceptor. The direct-positive element has reduced gradation and extended exposure latitude.
    Type: Grant
    Filed: January 11, 1974
    Date of Patent: June 15, 1976
    Assignee: AGFA-GEVAERT N.V.
    Inventor: Raymond Leopold Florens
  • Photographic element comprising a fogged, direct-positive heterodispersed silver halide emulsion and a fogged, direct-positive monodispersed silver halide
    Patent number: 3942986
    Abstract: Photographic direct-positive materials are described which comprise in admixture in a single layer or in superposed layers a monodispersed direct-positive emulsion and a heterodispersed direct-positive emulsion. By the use of both types of emulsions it is possible to obtain reduced contrast and good detail rendering in the high-light areas.
    Type: Grant
    Filed: June 3, 1974
    Date of Patent: March 9, 1976
    Assignee: AGFA-GEVAERT, N.V.
    Inventor: Raymond Leopold Florens