Granted Patent
Utility
US 4,908,104 · App. 07/291,131
Method of continuously carbonizing a mixture of primarily organic waste material
Inventors:
Bernard A. Loomans, James E. Kowalczyk, Harold Lange, Jerry W. Jones
Patented Case
View Patent ↗
Granted: Mar 13, 1990
Filed: Dec 28, 1988
Inventors
Bernard A. Loomans
James E. Kowalczyk
Harold Lange
Jerry W. Jones
Assignee (at issue)
APV Chemical Machinery 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.