Granted Patent
Utility
US 6,187,840 · App. 09/589,497
Chemically embossed metallocene polyethylene foam
Inventors:
Li-Ying Yang, Martin Dees, Jr.
Patented Case
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Granted: Feb 13, 2001
Filed: Jun 7, 2000
Inventors
Li-Ying Yang
Martin Dees, Jr.
Assignee (at issue)
ARMSTRONG WORLD INDUSTRIES, INC.
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.