IP Library Granted Patent US 6,403,238
Granted Patent Utility
US 6,403,238 · App. 09/346,149

Organic light-emitting diodes (OLED) including poly[2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene-1,2-ethenylene-2,5-dimethoxy-1,4-phenylene-1,2-ethenylene] as electroluminescent material

Inventors: Hans-Heinrich Horhold, Steffen Pfeiffer, Albrecht Uhlig, Gunter Heine, Manfred Helbig
Patented Case View Patent ↗
Granted: Jun 11, 2002 Filed: Jul 9, 1999
Inventors
Hans-Heinrich Horhold
Steffen Pfeiffer
Albrecht Uhlig
Gunter Heine
Manfred Helbig

This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.

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Quick Facts
Patent No.
US 6,403,238
App. No.
09/346,149
Filed
1999-07-09
Granted
2002-06-11
Kind
B1