Granted Patent
Utility
US 4,292,084 · App. 06/142,509
Vibratable plastic refractory
Inventors:
Stephen W. Thrower, George H. Criss, Thomas R. Kleeb
Patented Case
View Patent ↗
Granted: Sep 29, 1981
Filed: Apr 21, 1980
Inventors
Stephen W. Thrower
George H. Criss
Thomas R. Kleeb
Assignee (at issue)
Dresser 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.