Patents by Inventor Roberto Leoncavallo

Roberto Leoncavallo 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).

  • Patent number: 4367284
    Abstract: It is generally undesirable to have surfaces on photographic elements which are highly reflective and therefore reduce the attractiveness of the image. One of the traditional means of correcting this reflectance is to coat the developed film or print with an anti-reflective coating or to place a glass cover over the imaged photographic element where the glass itself has an anti-reflective surface.According to the present invention, an anti-reflective surface may be provided within the photographic element itself by including within a top coat gelatin layer a combination of a first water-soluble soft matting agent incompatible with gelatin and a second water-insoluble soft matting agent.
    Type: Grant
    Filed: May 26, 1981
    Date of Patent: January 4, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Luigi Cellone, Angelo Vallarino, Roberto Leoncavallo