Patents by Inventor Isao Kumasaka

Isao Kumasaka 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).

  • Anodized aluminum photographic plates with silver bromide in pores of oxide layer, and process of manufacture thereof
    Patent number: 4092169
    Abstract: An improved photographic element having high photosensitivity, which element comprises an anodized aluminum plate as a support having silver halide adsorbed in the pores of the oxide layer on the surface of said plate. The improvement comprises adding aqueous ammonia to a solution of silver nitrate used in forming said silver halide, the amount of aqueous ammonia being sufficient to raise the photosensitivity of the element.
    Type: Grant
    Filed: March 12, 1974
    Date of Patent: May 30, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Isao Kumasaka