Granted Patent
Utility
US 4,961,391 · App. 07/330,167
Thermal treatment process for organically contaminated material
Inventors:
Kai K. Mak, Rudy G. Novak, Robert D. Fox, Richard W. Helse
Patented Case
View Patent ↗
Granted: Oct 9, 1990
Filed: Mar 29, 1989
Inventors
Kai K. Mak
Rudy G. Novak
Robert D. Fox
Richard W. Helse
Assignee (at issue)
International Technology Group
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.