Granted Patent
Utility
US 4,816,137 · App. 06/911,078
Method for cracking residual oils
Inventors:
Richard E. Swint, Robert J. Newman
Patented Case
View Patent ↗
Granted: Mar 28, 1989
Filed: Dec 23, 1986
Inventors
Richard E. Swint
Robert J. Newman
Assignee (at issue)
Total Engineering and Research Company
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.