Granted Patent
Utility
US 4,552,781 · App. 06/597,869
Method utilizing ultrasonically induced cavitation to impregnate porous sheet passing through a resin bath
Inventors:
Daniel L. Cannady, Jr., Gilbert G. Berg, Walter C. Leschek, Joseph F. Meier
Patented Case
View Patent ↗
Granted: Nov 12, 1985
Filed: Apr 9, 1984
Inventors
Daniel L. Cannady, Jr.
Gilbert G. Berg
Walter C. Leschek
Joseph F. Meier
Assignee (at issue)
Westinghouse Electric Company LLC
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.