The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2022
Filed:
Aug. 30, 2019
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Toshiba Materials Co., Ltd., Yokohama, JP;
Tomohiro Yamashita, Yokohama, JP;
Takahiro Kawamoto, Kawasaki, JP;
Tomoko Eguchi, Yokohama, JP;
Takashi Kuboki, Ota, JP;
Kabushiki Kaisha Toshiba, Minato-ku, JP;
TOSHIBA MATERIALS CO., LTD., Yokohama, JP;
Abstract
A heat regenerating material particle of an embodiment contains a heat regenerating substance having a maximum value of specific heat at a temperature of 20 K or less is 0.3 J/cm·K or more, and one metal element selected from the group consisting of calcium (Ca), magnesium (Mg), beryllium (Be), strontium (Sr), aluminum (Al), iron (Fe), copper (Cu), nickel (Ni), and cobalt (Co). The heat regenerating material particle includes a first region and a second region, the second region is closer to an outer edge of the heat regenerating material particle than the first region, and the second region has a higher concentration of the metal element than the first region.