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:
Apr. 14, 1992
Filed:
Feb. 20, 1990
Masanao Shinkai, Saitama, JP;
Tohru Namiki, Saitama, JP;
Hitoshi Nakada, Saitama, JP;
Takeo Wakimoto, Saitama, JP;
Ryuji Murayama, Saitama, JP;
Daisaku Matsunaga, Tokyo, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Abstract
The electroluminescent element of the present invention comprises a fluorescent substance layer containing a courmarinic or azacoumarinic derivative and a hole transport layer, both made of organic compounds and laminated on top of the other. The both layers are interposed between cathode and anode electrodes. It emits light efficiently at a high luminance upon application of a low voltage between the electrodes.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile