Granted Patent
Utility
US 4,061,562 · App. 05/704,454
Thermal cracking of hydrodesulfurized residual petroleum oils
Inventors:
Joel D. McKinney, Raynor T. Sebulsky, Francis Edmund Wynne, Jr.
Patented Case
View Patent ↗
Granted: Dec 6, 1977
Filed: Jul 12, 1976
Inventors
Joel D. McKinney
Raynor T. Sebulsky
Francis Edmund Wynne, Jr.
Assignee (at issue)
Gulf Research & Development 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.