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:
Dec. 07, 2004
Filed:
Mar. 20, 2003
Applicant:
Inventors:
Hirofumi Wada, Uji, JP;
Satoshi Hirosawa, Otsu, JP;
Assignee:
Meomax Co., Ltd., Okada, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F25B 2/100 ;
U.S. Cl.
CPC ...
F25B 2/100 ;
Abstract
A magnetic refrigerant material exhibits sufficiently great magnetocaloric effect at or near room temperature. The magnetic refrigerant material has an NiAs type hexagonal structure in a ferromagnetic phase. The magnetic refrigerant material includes a first element Mn, a second element As and a third element to substitute for a portion of the second element, and exhibits a magnetic phase transition in a temperature range from about 230 K to less than about 318 K.