Patents by Inventor Sajuro Fujimagari

Sajuro Fujimagari 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 recovering support from photographic film
    Patent number: 5017455
    Abstract: A process for recovering a support from a photographic film is disclosed. The photographic film comprises the support and an undercoating layer provided thereon. The support is made of cellulose triacetate film base. The undercoating layer contains gelatin and cellulose nitrate. According to the present invention, the process comprises the steps of: (I) treating the photographic film with an aqueous solution of a surfactant; and then (II) treating the photographic film with an aqueous solution of a protease to remove the undercoating layer from the support. The aqueous solution of the protease used at the step of (II) preferably further contains an anionic surfactant. It is also preferred that the process further contains the step of (III) treating the recovered support with an aqueous solution of hydrogen peroxide to bleach the support.
    Type: Grant
    Filed: April 11, 1990
    Date of Patent: May 21, 1991
    Assignees: Fuji Photo Film Co., Panac-Industries Inc.
    Inventors: Goichi Hayashi, Sajuro Fujimagari, Kensaku Nakamura, Ryuichi Ishida