Granted Patent
Utility
US 6,724,142 · App. 10/062,095
Highly efficient fluorescent material
Inventors:
Andries Ellens, Guenter Huber
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Jan 31, 2002
Inventors
Andries Ellens
Guenter Huber
Assignee (at issue)
Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
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.