Granted Patent
Utility
US 5,988,396 · App. 09/135,683
Ultrasonic conditioning and wet scrubbing of fly ash
Inventors:
Rafic Y. Minkara, Jerry L. Heavilon
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Aug 18, 1998
Inventors
Rafic Y. Minkara
Jerry L. Heavilon
Assignee (at issue)
ISG Resources, 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.