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. 03, 1991
Filed:
Dec. 01, 1989
Applicant:
Inventors:
Akira Aoki, Sakai, JP;
Yukio Fujishima, Sakai, JP;
Yusuke Makio, Takatsuki, JP;
Susumu Kusakawa, Yokkaichi, JP;
Sadaaki Tsuji, Yokkaichi, JP;
Tadashi Okamura, Mie, JP;
Assignees:
Osaka-Fu, Osaka, JP;
Itoh Seiyu Kabushiki Kaisha, Yokkaichi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
25230136 ;
Abstract
A powder electroluminescent element which comprises electroluminescent particles and an organic binder at least partly comprising a polyurethane shows a high emission intensity or brightness and has a prolonged operating life.