Patents by Inventor Kikuo Otomo

Kikuo Otomo 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).

  • Method for separating a trihalogenobenzene isomer
    Patent number: 4798913
    Abstract: A method for separating a trihalogenobenzene isomer from a mixture of at least two trihalogenobenzene isomers selected from the group consisting of 1,2,3-, 1,2,4- and 1,3,5-substituted isomers among trihalogenobenzenes represented by the formula: ##STR1## wherein X is Cl or Br, by means of a zeolite adsorber, characterized in that a ZSM-zeolite is used as the adsorber.
    Type: Grant
    Filed: January 5, 1988
    Date of Patent: January 17, 1989
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Kikuo Otomo, Masashi Yamagushi, Masami Ito, Hiroki Tokunaga
  • Heat sensitive record material
    Patent number: 4550329
    Abstract: A heat sensitive record material comprising at least one colorless or light-colored electron donative dyestuff and at least one color developing agent represented by the general formula: ##STR1## where each of R.sub.1 and R.sub.2 is hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, an alkoxy group having from 1 to 5 carbon atoms or a halogen atom, X is an alkyl group having from 1 to 5 carbon atoms or a halogen atom, Y is a hydroxyl group, an alkyl group having from 1 to 5 carbon atoms or a halogen atom, n is an integer of 1 to 3, and m is an integer of 1 to 4.
    Type: Grant
    Filed: August 31, 1984
    Date of Patent: October 29, 1985
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Michihiro Gonda, Katsumasa Kitsukawa, Susumu Suzuka, Mikiko Kanasugi, Yutaka Sato, Kikuo Otomo