US Patent Issued to NIPPON CHEMICAL INDUSTRIAL on March 31 for "Negative thermal expansion material and composite material" (Japanese Inventors)

ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,012, issued on March 31, was assigned to NIPPON CHEMICAL INDUSTRIAL Co. LTD. (Tokyo).

"Negative thermal expansion material and composite material" was invented by Takuma Kato (Tokyo), Junya Fukazawa (Tokyo) and Toru Hata (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An object of the present invention is to provide a negative thermal expansion material having better negative thermal expansion characteristics. The present invention is a negative thermal expansion material, comprising a copper vanadium composite oxide represented by the following general formula (1): CuxCayVzOt. In the general formula (1), 0greater thanxgreater than2.50, 0grea...