IP Library › Granted Patent US 5,723,040
Granted Patent Utility
US 5,723,040 · App. 08/333,549

Fluid catalytic cracking process and apparatus

Inventors: Warren S. Letzsch, Gerald Earl
Patented Case View Patent ↗
Granted: Mar 3, 1998 Filed: Nov 2, 1994
Inventors
Warren S. Letzsch
Gerald Earl
Assignee (at issue)
Stone & Webster Engineering Corp.

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 5,723,040
App. No.
08/333,549
Filed
1994-11-02
Granted
1998-03-03
Kind
A