Granted Patent
Utility
US 6,589,672 · App. 09/547,819
Blue color filter and organic electroluminescent device using same
Inventors:
Ryoji Kobayashi, Yotaro Shiraishi, Koji Kawaguchi
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: Apr 11, 2000
Inventors
Ryoji Kobayashi
Yotaro Shiraishi
Koji Kawaguchi
Assignee (at issue)
FUJI ELECTRIC CO., LTD.
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.