Granted Patent
Utility
US 6,451,461 · App. 09/778,859
Hole transporting compounds having good thermal stability for organic electroluminescent device and method for production thereof
Inventors:
Ji Hoon Lee, In-seo Kee, Sung Woo Cho, Byung-Hoon Chae
Patented Case
View Patent ↗
Granted: Sep 17, 2002
Filed: Feb 8, 2001
Inventors
Ji Hoon Lee
In-seo Kee
Sung Woo Cho
Byung-Hoon Chae
Assignee (at issue)
SAMSUNG DISPLAY 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.