Patents by Inventor Tetuya Suzuki

Tetuya Suzuki 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 preparing a silver halide emulsion
    Patent number: 5215879
    Abstract: A silver halide photographic emulsion containing silver halide twinned-crystal grains is prepared by the steps of (a) forming silver halide nuclear grains by mixing a water soluble silver salt and a water soluble halide, (b) forming silver halide seed-emulsion grains by carrying out ripening of the nuclear grains formed in (a), and (c) growing the seed-emulsion grains, wherein a water soluble polymer is introduced by (b), having the repetition unit represented by the following formula [P] in an amount of 10 to 100 mol % per each polymer molecule: ##STR1##
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: June 1, 1993
    Assignee: Konica Corporation
    Inventors: Tetuya Suzuki, Shin-ichi Yamamoto, Harumi Asakawa, Toshihiko Yagi, Noriki Tachibana