Granted Patent
Utility
US 5,733,438 · App. 08/547,639
Coke inhibitors for pyrolysis furnaces
Inventors:
Youdong Tong, Michael K. Poindexter, C. Tom Rowe
Patented Case
View Patent ↗
Granted: Mar 31, 1998
Filed: Oct 24, 1995
Inventors
Youdong Tong
Michael K. Poindexter
C. Tom Rowe
Assignee (at issue)
Nalco/Exxon Energy Chemicals, L.P.
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.