Patents by Inventor Hiroyuki Inokuma

Hiroyuki Inokuma 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).

  • Magnetic recording medium
    Patent number: 4698280
    Abstract: A magnetic recording medium having a magnetic layer and optionally a backing layer, wherein at least one of said magnetic layer and said backing layer contains a fungicide selected from the group consisting of 2-(4-thiazolyl) benzimidazole, N-(fluorodichloromethylthio)-phthalimide, N,N-dimethyl-N'-phenyl-N'-fluorodichloromethylthio-sulfamide.
    Type: Grant
    Filed: September 9, 1985
    Date of Patent: October 6, 1987
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kiyomitsu Mine, Yayoi Kobayashi, Yasushi Kawaguchi, Hiroyuki Inokuma
  • Gelatin hardening process
    Patent number: 4039520
    Abstract: A process for hardening gelatin which comprises reacting photographic gelatin with a compound of the general formula[A-B-(NHCO).sub.m.sub.-1 X-Y].sub.n Zwherein A is CH.sub.2 =CH--, CH.sub.2 =C(R.sub.1)--, CH.sub.2 (R.sub.1)--CH.sub.2 -- or CH.sub.2 (R.sub.1)--CH(R.sub.2)-- (where R.sub.1 and R.sub.2 are halogens); B is --CO-- or --SO.sub.2 --; X is oxygen, sulfur or --NH--; Y is --CO--, --SO.sub.2 -- or a simple bond, and when Y is --CO-- or SO.sub.2 --, X is --NH--; m is 1 or 2; n is an integer of 2 or more; and Z is a simple bond, an n-valent aliphatic, alicyclic, aromatic or heterocyclic group, or an n-valent group comprising the combination of said groups, --CO--, ##STR1## in which R.sub.3 and R.sub.
    Type: Grant
    Filed: March 11, 1974
    Date of Patent: August 2, 1977
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Teiji Habu, Hisashi Yamaguchi, Tsuneo Wada, Takashi Sasaki, Hiroki Ishii, Takayoshi Omura, Hiroyuki Inokuma
  • Gelatin hardening process
    Patent number: 3981857
    Abstract: A process for hardening gelatin which comprises reacting photographic gelatin with a compound of the general formula ##SPC1##Wherein R.sub.1 and R.sub.2 individually are halogen, an aryloxy group which may have substituents, or an arylthio group which may have substituents; X is a simple bond, an alkylene group which may have substituents --CO, --CO--R.sub.5 --CO-- (in which R.sub.5 is an alkylene group which may have substituents) or --R.sub.6 --(O--R.sub.6).sub.n -- (in which R.sub.6 is an alkylene group which may have substituents and n is a positive integer); an Y is a saturated or unsaturated hydrocarbon group which may have substituents, or a group ##SPC2##(in which R.sub.3 and R.sub.4 individually are halogen).
    Type: Grant
    Filed: March 18, 1974
    Date of Patent: September 21, 1976
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Teiji Habu, Hisashi Yamaguchi, Tsuneo Wada, Takashi Sasaki, Hiroki Ishii, Takayoshi Omura, Hiroyuki Inokuma
  • Silver halide emulsion containing an arylphosphonium salt as antifoggant
    Patent number: 3951661
    Abstract: Substances of the structure ##EQU1## wherein Z is phosphorus, X.sup.-is Cl.sup.-, Br.sup.-, ClO.sub.2 .sup.- or BF.sub.4 .sup.-, and R.sub.1 - R.sub.4 are alkyl or aromatic groups are excellent inhibitors of fog formation when incorporated in photographic emulsions containing silver halides.
    Type: Grant
    Filed: May 24, 1974
    Date of Patent: April 20, 1976
    Assignees: Konishiroku Photo Industry Co., Sankyo Company Limited
    Inventors: Nobuo Soma, Isao Kawamoto, Tomio Nakajima, Sadao Sugita, Tsuneo Wada, Shizuo Saito, Hiroyuki Inokuma, Koichi Horigome, Yukio Morifuji