Granted Patent
Utility
US 5,813,176 · App. 08/486,390
Asphaltic foam
Inventors:
Casey G. Tzeng, George F. Thagard, III
Patented Case
View Patent ↗
Granted: Sep 29, 1998
Filed: Jun 7, 1995
Inventors
Casey G. Tzeng
George F. Thagard, III
Assignee (at issue)
Fontana Paper Mills, 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.