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:
Mar. 28, 2023
Filed:
Feb. 23, 2018
Idemitsu Kosan Co., Ltd., Chiyoda-ku, JP;
Yumiko Mizuki, Basel, CH;
Francois Rime, Delemont, CH;
Natalia Chebotareva, Hagenthal le Bas, FR;
Hideaki Nagashima, Basel, CH;
Idemitsu Kosan Co., Ltd., Chiyoda-ku, JP;
Abstract
The present invention relates to a compound of formula (I), wherein R, R, Rand Rare each independently hydrogen or R, with proviso that a pair of two substituents selected from Rand R, Rand R, and Rand Ris linked to one another and forms a group of formula (II); a material for an organic electroluminescence device comprising at least one compound of formula (I); an organic electroluminescence device which comprises an organic thin film layer be-tween an anode and a cathode, wherein the organic thin film layer comprises one or more layers and comprises a light emitting layer, and at least one layer of the organic thin film layer comprises at least one compound of formula (I); and an electronic equipment comprising the inventive organic electroluminescence device.