Patents by Inventor Kunihisa Satoh

Kunihisa Satoh 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).

  • Acid liquid leakage sensor
    Patent number: 8088331
    Abstract: An acid liquid leakage sensor quickly detecting liquid leakage from a device, such as a battery or the like, containing an acid liquid includes a first conductive member, a second conductive member, and an electrically insulating material which establishes an electrically insulating state between these first and second conductive members. The electrically insulating material includes a macromolecular compound having a basic functional group, and an electrical insulation characteristic or high resistance characteristic that decreases upon reaction with an acid liquid. It is possible to detect leakage of acid liquid, such as battery fluid, by detecting the change of conductive state between the first conductive member and the second conductive member which accompanies a decrease of the electrical insulation characteristic or high resistance characteristic of the electrically insulating material, when acid liquid leaks out and drips down the electrically insulating material.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: January 3, 2012
    Assignees: Origin Electric Company, Limited, NTT Facilities, Inc.
    Inventors: Takeharu Ueda, Kunihisa Satoh, Keiichi Sato, Ichiro Kiyokawa, Tomonobu Tsujikawa, Toshio Matsushima
  • Acid Liquid Leakage Sensor
    Publication number: 20070275296
    Abstract: An acid liquid leakage sensor quickly detecting liquid leakage from a device, such as a battery or the like, containing an acid liquid includes a first conductive member, a second conductive member, and an electrically insulating material which establishes an electrically insulating state between these first and second conductive members. The electrically insulating material includes a macromolecular compound having a basic functional group, and an electrical insulation characteristic or high resistance characteristic that decreases upon reaction with an acid liquid. It is possible to detect leakage of acid liquid, such as battery fluid, by detecting the change of conductive state between the first conductive member and the second conductive member which accompanies a decrease of the electrical insulation characteristic or high resistance characteristic of the electrically insulating material, when acid liquid leaks out and drips down the electrically insulating material.
    Type: Application
    Filed: February 26, 2004
    Publication date: November 29, 2007
    Applicants: Origin Electric Company, Limited, NTT facilities, Inc.
    Inventors: Takeharu Ueda, Kunihisa Satoh, Keiichi Sato, Ichiro Kiyokawa, Tomonobu Tsujikawa, Toshio Matsushima
  • Process for producing aromatic polyethers with high molecular weights
    Patent number: 6828414
    Abstract: A process for producing an aromatic polyether having a high molecular weight, small dispersion of the molecular weight, excellent in the heat resistance as well as the impact resistance and represented by the formula (1): wherein each of x1 and x2 independently represents a halogen, and n represents an integer of 1 or above is provided, which comprises polymerizing 4,4′-biphenol with a 4,4′-dihalogenodiphenyl sulfone represented by the formula (2): wherein x1 and x2 have the same meaning as above, in an amount exceeding 1 time by mole and not exceeding 1.05 time by mole based on said 4,4′-biphenol in diphenyl sulfone and in the presence of an alkali metal carbonate and/or an alkali metal bicarbonate at a temperature which is not lower than 240° C. and not higher than 270° C.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: December 7, 2004
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kazushige Okamoto, Kunihisa Satoh
  • Aromatic polysulfone resin and use thereof
    Publication number: 20030224222
    Abstract: The present invention provides an aromatic polysulfone resin comprising a structural unit of the formula (I) 1
    Type: Application
    Filed: May 7, 2003
    Publication date: December 4, 2003
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Yoshiki Matsuoka, Kunihisa Satoh
  • Process for producing aromatic polyethers with high molecular weights
    Publication number: 20030114639
    Abstract: A process for producing an aromatic polyether having a high molecular weight, small dispersion of the molecular weight, excellent in the heat resistance as well as the impact resistance and represented by the formula (1): 1
    Type: Application
    Filed: September 10, 2002
    Publication date: June 19, 2003
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Kazushige Okamoto, Kunihisa Satoh
  • Polymer electrolyte for fuel cell
    Patent number: 5985477
    Abstract: Provided is a polymer electrolyte which is cheap and easily synthesized, and has a high water resistance and high output performance.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: November 16, 1999
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Katsuhiko Iwasaki, Taketsugu Yamamoto, Hiroshi Harada, Atsushi Terahara, Kunihisa Satoh