Patents by Inventor Tadayuki Nakousai

Tadayuki Nakousai 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).

  • Recording liquid
    Patent number: 4601756
    Abstract: A recording liquid comprises a liquid composition containing water-soluble dyes as coloring component, characterized in that C.I. Food Black 2 and one or more dyes in different color or colors are used in combination as said coloring component.
    Type: Grant
    Filed: October 15, 1984
    Date of Patent: July 22, 1986
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiro Chiba, Kazuo Iwata, Tadayuki Nakousai, Hiroko Ogawa, Takashi Ohba
  • Recording liquid
    Patent number: 4585484
    Abstract: A recording liquid comprises a dye selected from C.I. Direct Blue 199, C.I. Direct Yellow 86 and C.I. Food Black 2 as the recording agent for forming an image and a liquid medium for dissolving or dispersing said recording agent therein, said liquid medium comprising at least: (a) either one or both of polyethylene glycol and polyethylene glycol monomethyl ether, (b) either one or both of diethylene glycol and sulfolane, (c) either one or both of N-methyl-2-pyrrolidone and 1,3-dimethyl-2-imidazolidinone and (d) water.
    Type: Grant
    Filed: March 20, 1984
    Date of Patent: April 29, 1986
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiro Haruta, Tadayuki Nakousai, Kazuo Iwata, Keiko Nakousai