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:
Feb. 03, 2004
Filed:
Dec. 12, 2001
Applicant:
Inventor:
Jian Ping Chen, San Jose, CA (US);
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 3/312 ; C07C / ; C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
H05B 3/312 ; C07C / ; C07C / ; C07C / ; C07C / ;
Abstract
Organic materials based on [5] helicenes or dibenzofluorenes are shown to have excellent properties for use in electroluminescent devices, including high stability and efficiency and low excimer formation. The materials may advantageously be adapted to have hole transport or electron transport capabilities in addition to emissive properties.