Patents by Inventor Kazuya Katagai

Kazuya Katagai 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).

  • Patent number: 7200433
    Abstract: A transdermal or transmucosal drug delivery device excellent in terms of drug permeability and skin irritability and capable of reducing power consumption, is disclosed. An output control circuit (4) of an energization pattern controller (1) supplies a combined energization of pulse depolarized type energization and at least one of direct current type energization and pulse energization between an anode-side device (5) and a cathode-side device (6) of iontophoresis. The details of combination of energization in the output control circuit (4) is determined based on external setting of the energization pattern controller (1) or internal storage information.
    Type: Grant
    Filed: March 26, 2003
    Date of Patent: April 3, 2007
    Assignee: Hisamitsu Pharmaceutical Co., Inc.
    Inventors: Katsuhiro Nakamura, Kazuya Katagai, Kazutaka Inoue, Naruhito Higo
  • Patent number: 6643544
    Abstract: The present invention provides an iontophoresis device and an energization method whereby a prostaglandin can be effectively and continuously administered via a skin or mucosa. The iontophoresis device comprises the first electrode structure (31); the second electrode structure (32); and a power supply (33) electrically connected between the first and the second electrode structures (31), (32). At least one of the first and the second electrode structures contains a prostaglandin and also stabilizing means for inhibiting hydrolysis of the prostaglandin during storage. The power supply (33) is equipped with constant current supplying means and, when both electrode structures contain a prostaglandin, also polarity inverting means. Output current from the power supply may allow the prostaglandin to be delivered to a skin or mucosa.
    Type: Grant
    Filed: October 12, 2001
    Date of Patent: November 4, 2003
    Assignee: Hisamitsu Pharmaceutical Co., Inc.
    Inventors: Hirotoshi Adachi, Kazuya Katagai, Naruhito Higo
  • Publication number: 20030167073
    Abstract: A transdermal or transmucosal drug delivery device excellent in terms of drug permeability and skin irritability and capable of reducing power consumption, is disclosed. An output control circuit (4) of an energization pattern controller (1) supplies a combined energization of pulse depolarized type energization and at least one of direct current type energization and pulse energization between an anode-side device (5) and a cathode-side device (6) of iontophoresis. The details of combination of energization in the output control circuit (4) is determined based on external setting of the energization pattern controller (1) or internal storage information.
    Type: Application
    Filed: March 26, 2003
    Publication date: September 4, 2003
    Applicant: Hisamitsu Pharmaceutical Co., Inc.
    Inventors: Katsuhiro Nakamura, Kazuya Katagai, Kazutaka Inoue, Naruhito Higo
  • Patent number: 6564092
    Abstract: A transdermal or transmucosal drug delivery device excellent in terms of drug permeability and skin irritability and capable of reducing power consumption, is disclosed. An output control circuit (4) of an energization pattern controller (1) supplies a combined energization of pulse depolarized type energization and at least one of direct current type energization and pulse energization between an anode-side device (5) and a cathode-side device (6) of iontophoresis. The details of combination of energization in the output control circuit (4) is determined based on external setting of the energization pattern controller (1) or internal storage information.
    Type: Grant
    Filed: March 27, 2000
    Date of Patent: May 13, 2003
    Assignee: Hisamitsu Pharmaceutical Co., Inc.
    Inventors: Katsuhiro Nakamura, Kazuya Katagai, Kazutaka Inoue, Naruhito Higo
  • Patent number: 6006130
    Abstract: This invention relates to an iontophoresis electrode which is applicable to mucous membranes and oral mucous membranes, and especially capable of sticking directly on human oral mucous membranes and excellent in efficiently administering medicine and extremely easy to handle and lightweight.An iontophoresis electrode (Ka) of this invention comprises a backing layer (1) and, a conductive layer for current dispersion (2) made of silver or silver chloride that laminated on the backing layer (1) and, a spacer layer (3) of film, sheet, or cloth shape which is made of dried polymer layer with water soluble and swelling properties and laminated on the conductive layer for current dispersion, and can be sticked to the oral mucous membrane.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: December 21, 1999
    Assignee: Hisamitsu Pharmaceutical Co.
    Inventors: Naruhito Higo, Kenji Mori, Kazuya Katagai, Katsuhiro Nakamura