Granted Patent
Utility
US 6,180,267 · App. 09/226,667
Organic electroluminescent device containing a 1,3-dibenzylideneindane compound
Inventors:
Satoru Toguchi, Atsushi Oda, Hitoshi Ishikawa
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Jan 8, 1999
Inventors
Satoru Toguchi
Atsushi Oda
Hitoshi Ishikawa
Assignee (at issue)
NEC CORPORATION
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.