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:
Aug. 01, 1978
Filed:
Jun. 07, 1977
Applicant:
Inventors:
Yukinori Minagawa, Yokohama, JP;
Tsugio Kaneko, Tokyo, JP;
Fumikazu Yajima, Tokyo, JP;
Kunihiko Yamaguchi, Yokohama, JP;
Toshihiko Yoshitomi, Kawasaki, JP;
Assignee:
Mitsubishi Chemical Industries Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C01F / ;
U.S. Cl.
CPC ...
423 21 ; 7510 / ; 4236585 ;
Abstract
Yttrium ions are selectively extracted by contacting an acid phosphoric ester with an aqueous solution containing diethylenetriaminepentaacetic acid and yttrium ions and one or more heavy rare earth (atomic number of 64 to 71) ions.