Granted Patent
Utility
US 5,478,442 · App. 08/390,922
Treatment of petroleum cokes with a puffing inhibitor in a rotary calciner
Inventor:
Thomas H. Orac
Patented Case
View Patent ↗
Granted: Dec 26, 1995
Filed: Feb 15, 1995
Inventor
Thomas H. Orac
Assignee (at issue)
UCAR Carbon Technology Corporation
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.