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. 14, 2012
Filed:
Jun. 04, 2004
Yoshihiro Tsuda, Tsukuba, JP;
Yoshii Morishita, Tsukuba, JP;
Satoyuki Nomura, Tsukuba, JP;
Seiji Tai, Hitachi, JP;
Yousuke Hoshi, Tsukuba, JP;
Shigeaki Funyuu, Tsuchiura, JP;
Matthew L. Marrocco, Iii, Fontana, CA (US);
Farshad J. Motamedi, Claremont, CA (US);
Li-sheng Wang, Arcadia, CA (US);
Yoshihiro Tsuda, Tsukuba, JP;
Yoshii Morishita, Tsukuba, JP;
Satoyuki Nomura, Tsukuba, JP;
Seiji Tai, Hitachi, JP;
Yousuke Hoshi, Tsukuba, JP;
Shigeaki Funyuu, Tsuchiura, JP;
Matthew L. Marrocco, III, Fontana, CA (US);
Farshad J. Motamedi, Claremont, CA (US);
Li-Sheng Wang, Arcadia, CA (US);
Hitachi Chemical Co., Ltd., Tokyo, JP;
Maxdem Incorporated, San Dimas, CA (US);
Abstract
Objects of the present invention are to provide a purification process that enables Pd and P to be removed effectively, and to provide an electroluminescent material and an electroluminescent device obtained by employing the process. The present invention relates to a process for purifying an electroluminescent material, the process involving treating, with an oxidizing agent and then with a column, an electroluminescent material that contains Pd and/or P as impurities so as to remove the Pd and/or P.