Granted Patent
Utility
US 5,965,626 · App. 08/815,406
Method of making rigid asphaltic foam
Inventors:
Casey G. Tzeng, George F. Thagard, III
Patented Case
View Patent ↗
Granted: Oct 12, 1999
Filed: Mar 10, 1997
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.