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:
Jan. 29, 2002
Filed:
Aug. 09, 2001
Applicant:
Inventors:
Ki-jong Han, Daejeon, KR;
Youngkoo Kim, Pusan, KR;
Jae-Gyoung Lee, Seongnam-shi, KR;
Dong-Kwon Choi, Seoul, KR;
Assignee:
Nessdisplay Co., Ltd., Suwon-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
C07C / ;
Abstract
A novel diamine compound of formula (I) of the present invention having a high glass transition temperature is useful as an improved hole transport agent, and an organic electroluminescent device containing the diamine compound of formula (I) has good thermal and mechanical stabilities, and prolonged lifetime.
Han, Ki-jong. (2002). Diamine hole transport agent and organic electroluminescent device containing same (U.S. Patent No. 6342637). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6342637
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile