Patents by Inventor Tatsuo Nakahama

Tatsuo Nakahama 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).

  • Thioether derivatives, their method for production and use
    Patent number: 7205428
    Abstract: The present invention is directed to novel thioether dendritic molecules which respond immediately by emission of light when stimulated with light or electric energy.
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: April 17, 2007
    Assignee: National Institute of Information and Communications Technology, Incorporated Administrative Agency
    Inventors: Hideki Miki, Tatsuo Nakahama, Shiyoshi Yokoyama, Shinro Mashiko
  • Thioether derivatives, their method for production and use
    Patent number: 6630578
    Abstract: Novel dendritic molecules are provided which respond immediately by emission of light when stimulated with light or electric energy, and are useful, for example, as switching material of memory. The dendritic molecules have a core, a branch structure composed of Unit 1 represented by the following formula: wherein, ring A stands for a homo or heterocyclic six membered ring, optionally other branched structures, and surface functional groups as essential constituents.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: October 7, 2003
    Assignee: Communications Research Laboratory, Independent Administrative Institution
    Inventors: Hideki Miki, Tatsuo Nakahama, Shiyoshi Yokoyama, Shinro Mashiko
  • Novel thioether derivatives, their method for production and use
    Publication number: 20030171507
    Abstract: Purpose
    Type: Application
    Filed: January 17, 2003
    Publication date: September 11, 2003
    Inventors: Hideki Miki, Tatsuo Nakahama, Shiyoshi Yokoyama, Shinro Mashiko
  • Novel thioether derivatives, their method for production and use
    Publication number: 20020072583
    Abstract: The object of the present invention is to provide novel dendritic molecules which respond immediately by emission of light when stimulated with light or electric energy, and are useful, for example, as switching material of memory.
    Type: Application
    Filed: November 20, 2001
    Publication date: June 13, 2002
    Inventors: Hideki Miki, Tatsuo Nakahama, Shiyoshi Yokoyama, Shinro Mashiko
  • Sulfonylurea compounds and herbicidal use
    Patent number: 5017212
    Abstract: A compound of the general formula: ##STR1## wherein Q is a condensed heterocyclic group having an N atom in the bridgehead which may be substituted, W is O or S, R.sub.1 and R.sub.2 each are an alkyl group, an alkoxy group or halogen and Z is CH or N, and a salt thereof, which is useful as a herbicide.
    Type: Grant
    Filed: March 17, 1987
    Date of Patent: May 21, 1991
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yasuo Ishida, Kazunari Ohta, Tatsuo Nakahama, Harutoshi Yoshikawa