Patents by Inventor Kazuo Nakai

Kazuo Nakai 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).

  • Benzhydryl derivatives
    Patent number: 6787543
    Abstract: A compound of the formula (I): in which Z, R1, R2, R8, R10, R11, R12, R13 and R14 are each as defined in the description, or a salt thereof. The object compound of the present invention has pharmacological activities such as Tachykinin antagonism, and is useful for manufacture of a medicament for treating or preventing Tachykinin-mediated diseases.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: September 7, 2004
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Kazuhiko Take, Chiyoshi Kasahara, Shinji Shigenaga, Hidenori Azami, Yoshiteru Eikyu, Kazuo Nakai, Masataka Morita
  • Benzhydryl derivatives
    Publication number: 20030176430
    Abstract: A compound of the formula (I): in which Z, R1, R2, R8, R10, R11, R12, R13 and R14 are each as defined in the description, or a salt thereof. The object compound of the present invention has pharmacological activities such as Tachykinin antagonism, and is useful for manufacture of a medicament for treating or preventing Tachykinin-mediated diseases.
    Type: Application
    Filed: December 20, 2002
    Publication date: September 18, 2003
    Inventors: Kazuhiko Take, Chiyoshi Kasahara, Shinji Shigenaga, Hidenori Azami, Yoshiteru Eikyu, Kazuo Nakai, Masataka Morita
  • AROYL-PIPERAZINE DERIVATIVES, THEIR PREPARATION AND THEIR USE AS TACHYKININ ANTAGONISTS
    Publication number: 20030114668
    Abstract: This invention relates to piperazine derivatives of formula (I), wherein Y is bond or lower alkylene, R1 is aryl which may have substituent(s), R2 is aryl or indolyl, each of which may have substituent(s), R3 is hydrogen or lower alkyl, and R4 is as defined in the description, and its pharmaceutically acceptable salt, to processes for preparation thereof, to pharmaceutical composition comprising the same, and to a use of the same for treating or preventing Tachykinin-mediated diseases in human beings or animals.
    Type: Application
    Filed: January 7, 2000
    Publication date: June 19, 2003
    Inventors: HIROSHI MIYAKE, KAZUHIKO TAKE, SHINJI SHIGENAGA, HIDENORI AZAMI, HIROSHI SASAKI, YOSHITERU EIKYU, KAZUO NAKAI, JUNYA ISHIDA, TAKASHI MANABE, NOBUKIYO KONISHI, TADASHI TERASAKA
  • Multivibrator waveform monitoring system
    Patent number: 5412623
    Abstract: A multivibrator waveform monitoring system uses a plurality of seismic energy sources for giving vibrations to strata and a prospector, connected to a geophone, for measuring reflected vibrations. Each of the plurality of seismic energy sources includes a vibrator, a communication unit and a control unit for controlling the starting of the vibrator based on phase difference cancellation information and an operation starting instruction from the prospector. The prospector includes a communication unit and a synchronization control unit for controlling the synchronization of each of the seismic energy sources.
    Type: Grant
    Filed: April 1, 1994
    Date of Patent: May 2, 1995
    Assignee: Japex Geoscience Institute, Inc.
    Inventors: Masaaki Asada, Kazuo Nakai
  • Multivibrator waveform monitoring system
    Patent number: 5327399
    Abstract: A multivibrator waveform monitoring system uses a plurality of seismic energy sources for giving vibrations to strata and a prospector, connected to a geophone, for measuring reflected vibrations. Each of the plurality of seismic energy sources includes a vibrator, a communication unit and a control unit for controlling the starting of the vibrator based on phase difference cancellation information and an operation starting instruction from the prospector. The prospector includes a communication unit and a synchronization control unit for controlling the synchronization of each of the seismic energy sources.
    Type: Grant
    Filed: November 19, 1991
    Date of Patent: July 5, 1994
    Assignee: Japex Geoscience Institute, Inc.
    Inventors: Masaaki Asada, Kazuo Nakai