Patents by Inventor IZUMI HIRASAWA

IZUMI HIRASAWA 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).

  • Heat storage material composition, heat storage device, and heat storage method
    Patent number: 9758710
    Abstract: A heat storage material composition contains a sugar alcohol and a stabilizer that allows the sugar alcohol to maintain a liquid state and a supercooled state. The stabilizer is one selected from (i) a salt that has a solubility of 9 g or more in 100 mL of 20° C. water and gives a monovalent anion, (ii) a polymer prepared by using the salt as a monomer, and (iii) a polymer having a molecular weight of 7,000 or more and 4,000,000 or less prepared by using, as a monomer, an alcohol having a solubility of 9 g or more in 100 mL of 20° C. water.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: September 12, 2017
    Assignee: PANASONIC CORPORATION
    Inventors: Motohiro Suzuki, Hironobu Machida, Shinsuke Takeguchi, Kentaro Shii, Izumi Hirasawa, So Morioka
  • Heat storage material composition and method for using heat storage material composition
    Patent number: 9732264
    Abstract: A heat storage material composition contains sodium acetate, water, and an organic compound comprising a hydrophobic group and a hydrophilic group. A weight ratio R (sodium acetate/water) of the sodium acetate to the water is 57/43 or less. A concentration Ws of the sodium acetate in three components of the sodium acetate, the water, and the organic compound comprising a hydrophobic group and a hydrophilic group is 52% by weight or more. A concentration Wa of the organic compound comprising a hydrophobic group and a hydrophilic group in the three components is 1% by weight or more.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: August 15, 2017
    Assignee: PANASONIC CORPORATION
    Inventors: Motohiro Suzuki, Izumi Hirasawa
  • HEAT STORAGE MATERIAL COMPOSITION, HEAT STORAGE DEVICE, AND HEAT STORAGE METHOD
    Publication number: 20160090520
    Abstract: A heat storage material composition contains a sugar alcohol and a stabilizer that allows the sugar alcohol to maintain a liquid state and a supercooled state. The stabilizer is one selected from (i) a salt that has a solubility of 9 g or more in 100 mL of 20° C. water and gives a monovalent anion, (ii) a polymer prepared by using the salt as a monomer, and (iii) a polymer having a molecular weight of 7,000 or more and 4,000,000 or less prepared by using, as a monomer, an alcohol having a solubility of 9 g or more in 100 mL of 20° C. water.
    Type: Application
    Filed: September 17, 2015
    Publication date: March 31, 2016
    Inventors: MOTOHIRO SUZUKI, HIRONOBU MACHIDA, SHINSUKE TAKEGUCHI, KENTARO SHII, IZUMI HIRASAWA, SO MORIOKA
  • HEAT STORAGE MATERIAL COMPOSITION AND METHOD FOR USING HEAT STORAGE MATERIAL COMPOSITION
    Publication number: 20150090422
    Abstract: A heat storage material composition contains sodium acetate, water, and an organic compound comprising a hydrophobic group and a hydrophilic group. A weight ratio R (sodium acetate/water) of the sodium acetate to the water is 57/43 or less. A concentration Ws of the sodium acetate in three components of the sodium acetate, the water, and the organic compound comprising a hydrophobic group and a hydrophilic group is 52% by weight or more. A concentration Wa of the organic compound comprising a hydrophobic group and a hydrophilic group in the three components is 1% by weight or more.
    Type: Application
    Filed: September 25, 2014
    Publication date: April 2, 2015
    Inventors: MOTOHIRO SUZUKI, IZUMI HIRASAWA