Patents by Inventor Mitsunao Tanaka

Mitsunao Tanaka 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).

  • Light emitting method of acridinium derivative and method of detecting substance to be examined using same
    Patent number: 5879888
    Abstract: A light emitting method of an acridinium ester, comprising reacting said acridinium ester and a superoxide anion, and a method of detecting a substance to be examined, comprising detecting a light emitted by reacting a superoxide anion with an acridinium ester used as a label are described. It is possible to carry out the reaction not under strongly alkaline conditions but around the neutral point and to generate strong luminescence which is stable over a long period of time.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: March 9, 1999
    Assignee: Iatron Laboratories, Inc.
    Inventors: Masuo Aizawa, Yoshihito Ikariyama, Eiry Kobatake, Minoru Ogasawara, Mitsunao Tanaka
  • Microplate light-obstruction device and light-emission measuring apparatus
    Patent number: 5682232
    Abstract: A light-emission measuring apparatus which is capable of eliminating various secondary problems in addition to shutting off strong light from the external and preventing crosstalk. The light-emission measuring apparatus is equipped with a box-type carrier 9 having an open top surface and made to accommodate a microplate 7 comprising a plurality of wells. The box-type carrier is disposed to be movable horizontally. A light-obstruction plate having a light-receiving hole 11 is disposed above the box-type carrier to be movable vertically. The light-obstruction plate 5 is brought into tight contact with a circumference of the box-type carrier 9 to establish a black box when being moved downwardly. Further, the light-receiving hole 11 of the light-obstruction plate 5 has a cylindrical projecting bottom surface 12 so that its bottom surface side outer circumference comes into tight contact with a circumference 13 of an opening of a well top surface of the microplate 7.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: October 28, 1997
    Assignees: Precision System Science Co., Ltd., Iatron Laboratories, Inc.
    Inventors: Hideji Tajima, Nobuo Nagaoka, Minoru Ogasawara, Mitsunao Tanaka
  • Polyelectrolyte complex antibacterial agent and antibacterial material
    Patent number: 5658915
    Abstract: An antibacterial agent characterized by containing a polyelectrolyte complex prepared by reacting a cationic polymer containing N.sup.+ atoms in repeating units thereof and an anionic polymer containing --COO.sup.-, --SO.sub.3.sup.-, or --PO.sub.3.sup.- groups in repeating units thereof, and an antibacterial material carrying the above polyelectrolyte complex on a carrier.
    Type: Grant
    Filed: August 25, 1995
    Date of Patent: August 19, 1997
    Assignee: Iatron Laboratories, Inc.
    Inventors: Koji Abe, Mitsunao Tanaka, Satoshi Inaba, Masaharu Akimoto
  • Polyelectrolyte complex antibacterial agent in antibacterial material
    Patent number: 5578598
    Abstract: An antibacterial agent characterized by containing a polyelectrolyte complex prepared by reacting a cationic polymer containing N.sup.+ atoms in repeating units thereof and an anionic polymer containing --COO.sup.--, --SO.sub.3.sup.--, or --PO.sub.3.sup.-- groups in repeating units thereof, and an antibacterial material carrying the above polyelectrolyte complex on a carrier.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: November 26, 1996
    Assignee: Iatron Laboratories, Inc.
    Inventors: Koji Abe, Mitsunao Tanaka, Satoshi Inaba, Masaharu Akimoto
  • Method for measurement of fructosamines using 1,2-quinones
    Patent number: 5312759
    Abstract: A method for measurement of fructosamines in an aqueous liquid characterized by including the steps of:(a) bringing an aqueous liquid sample into contact with one or more active oxygen producing substances;(b) bringing the product of said step (a) into contact with a reagent producing a detectable change in the presence of hydrogen peroxide derived from the active oxygen, and(c) detecting an occurrence of the detectable change of said step (b).
    Type: Grant
    Filed: August 2, 1991
    Date of Patent: May 17, 1994
    Assignee: Iatron Laboratories, Inc.
    Inventors: Michio Hama, Michiyo Nakayama, Mitsunao Tanaka
  • Luminescence by reacting an acridinium ester with superoxide
    Patent number: RE39047
    Abstract: A light emitting method of an acridinium ester, comprising reacting said acridinium ester and a superoxide anion, and a method of detecting a substance to be examined, comprising detecting a light emitted by reacting a superoxide anion with an acridinium ester used as a label am described. It is possible to carry out the reaction not under strongly alkaline conditions but around the neutral point and to generate strong luminescence which is stable over a long period of time.
    Type: Grant
    Filed: March 8, 2001
    Date of Patent: March 28, 2006
    Assignee: Mitsubishi Kagaku Iatron, Inc.
    Inventors: Masuo Aizawa, Michiko Ikariyama, Eiry Kobatake, Minoru Ogasawara, Mitsunao Tanaka, Yoshihito Ikariyama