Granted Patent
Utility
US 5,494,940 · App. 08/027,975
Low density materials having high surface areas and articles formed therefrom
Inventors:
Peter D. Unger, Ronald P. Rohrbach
Patented Case
View Patent ↗
Granted: Feb 27, 1996
Filed: Mar 8, 1993
Inventors
Peter D. Unger
Ronald P. Rohrbach
Assignee (at issue)
AlliedSignal, 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.