Patents by Inventor Kiiti Ema

Kiiti Ema 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 2,3,5-trimethylbenzoquinone
    Patent number: 5104996
    Abstract: 2,3,5-trimethyl-benzoquinone is produced by oxidizing 2,3,6-trimethyl-phenol in the presence of a catalyst of cupric chloride and lithium chloride in a solvent mixture of an aromatic hydrocarbon and a lower aliphatic alcohol having 1 to 4 carbon atoms.
    Type: Grant
    Filed: May 11, 1988
    Date of Patent: April 14, 1992
    Assignee: Eisai Co., Ltd.
    Inventors: Noriyasu Hirose, Kimio Hamamura, Yuichi Inai, Kiiti Ema, Takashi Banba, Shizumasa Kijima
  • Novel vitamin E derivatives and process for the production thereof
    Patent number: 5102895
    Abstract: The novel vitamin E derivative provides an excellent antihyperlipemic effect and is defined by the formula (I): ##STR1## wherein R represents a nicotinoyl group; and m is an integer of from 2 to 5 while n is an integer of from 3 to 6, provided that n is larger than m.
    Type: Grant
    Filed: December 31, 1990
    Date of Patent: April 7, 1992
    Assignee: Eisai Co., Ltd.
    Inventors: Noriyasu Hirose, Kimio Hamamura, Takaharu Nakamura, Kiiti Ema, Takashi Banba, Tetsuya Nakamura, Hidetoshi Kawashima, Yuuichi Inai, Noritoshi Sano, Yuko Miyauchi, Shizumasa Kijima