IP Library Granted Patent US 4,428,823
Granted Patent Utility
US 4,428,823 · App. 06/455,355

Integrated thermal cracking and visbreaking process

Inventors: Norman F. Hessler, Frank Stolfa, William H. Munro
Patented Case View Patent ↗
Granted: Jan 31, 1984 Filed: Jan 3, 1983
Inventors
Norman F. Hessler
Frank Stolfa
William H. Munro
Assignee (at issue)
UOP LLC

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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,428,823
App. No.
06/455,355
Filed
1983-01-03
Granted
1984-01-31
Kind
A