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:
Oct. 08, 2019
Filed:
Nov. 21, 2017
Applicants:
Sumitomo Chemical Company Limited, Tokyo, JP;
Cambridge Display Technology Limited, Cambridgeshire, GB;
Inventors:
Ruth Pegington, Godmanchester, GB;
Martin Humphries, Godmanchester, GB;
Assignees:
Sumitomo Chemical Company Limited, Tokyo, JP;
Cambridge Display Technology Limited, Godmanchester, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 401/06 (2006.01); A61K 31/517 (2006.01); H01L 51/00 (2006.01); C08G 61/12 (2006.01); C07D 401/14 (2006.01); C07D 417/14 (2006.01); H01L 51/50 (2006.01); H01L 51/56 (2006.01);
U.S. Cl.
CPC ...
A61K 31/517 (2013.01); C07D 401/06 (2013.01); C07D 401/14 (2013.01); C07D 417/14 (2013.01); C08G 61/12 (2013.01); H01L 51/00 (2013.01); H01L 51/0039 (2013.01); H01L 51/0043 (2013.01); H01L 51/0095 (2013.01); C08G 2261/12 (2013.01); C08G 2261/228 (2013.01); C08G 2261/3142 (2013.01); C08G 2261/3162 (2013.01); C08G 2261/418 (2013.01); C08G 2261/512 (2013.01); C08G 2261/71 (2013.01); C08G 2261/95 (2013.01); H01L 51/5004 (2013.01); H01L 51/5056 (2013.01); H01L 51/56 (2013.01); H01L 2251/308 (2013.01);
Abstract
An OLED comprising a hole-transporting layer and light-emitting layer wherein the hole-transporting layer comprises a hole-transporting polymer wherein no more than 5% of the polystyrene equivalent polymer weight measured by gel permeation chromatography consists of chains with weight of less than 50,000.