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. 16, 1977
Filed:
May. 22, 1972
Applicant:
Inventors:
Tsuyoshi Kano, Tokyo, JA;
Masaki Nakako, Hachioji, JA;
Hajime Yamamoto, Tokyo, JA;
Yoshiro Otomo, Mitaka, JA;
Assignee:
Hitachi, Ltd., , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
2523 / ;
Abstract
A hexagonal NaLnF.sub.4 :Yb.sup.3.sup.+, Er.sup.3.sup.+ (Ln represents the elements Y, La, Gd and/or Lu) has been found to be an efficient phospor emitting green light with infrared excitation, which can be prepared by firing a mixture of Na.sub.2 SiF.sub.6 and coprecipitated Ln.sub.1.sub.-y.sub.-z Yb.sub.y Er.sub.z F.sub.3. Optimum firing conditions for synthesis of NaLnF.sub.4 :Yb.sup.3.sup.+, Er.sup.3.sup.+ have been found to be such that:
Kano, Tsuyoshi. (1977). Process of preparing infrared-excitable sodium rare earth fluoride (U.S. Patent No. 4042527). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4042527
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile