IP Library › Granted Patent US 5,178,651
Granted Patent Utility
US 5,178,651 · App. 07/741,651

Method for purifying gas distribution systems

Inventors: Frank Balma, Brent Donald Alfred Elliot
Patented Case View Patent ↗
Granted: Jan 12, 1993 Filed: Aug 7, 1991
Inventors
Frank Balma
Brent Donald Alfred Elliot

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 5,178,651
App. No.
07/741,651
Filed
1991-08-07
Granted
1993-01-12
Kind
A