Granted Patent
Utility
US 4,479,805 · App. 06/531,257
Treating-high asphaltene fuel oils
Inventor:
Sushil K. Batra
Patented Case
View Patent ↗
Granted: Oct 30, 1984
Filed: Sep 12, 1983
Inventor
Sushil K. Batra
Assignee (at issue)
Columbia Chase 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.