Granted Patent
Utility
US 4,534,853 · App. 06/543,359
Method for cracking residual oils
Inventors:
Gary N. Long, Regis J. Pellet, Jule A. Rabo
Patented Case
View Patent ↗
Granted: Aug 13, 1985
Filed: Oct 19, 1983
Inventors
Gary N. Long
Regis J. Pellet
Jule A. Rabo
Assignee (at issue)
Union Carbide 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.