IP Library Granted Patent US 4,627,969
Granted Patent Utility
US 4,627,969 · App. 06/649,923

Production of chlorine dioxide

Inventors: Maurice C. J. Fredette, Ching-Shi Yang
Patented Case View Patent ↗
Granted: Dec 9, 1986 Filed: Sep 13, 1984
Inventors
Maurice C. J. Fredette
Ching-Shi Yang
Assignee (at issue)
Tenneco Canada Inc.

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 4,627,969
App. No.
06/649,923
Filed
1984-09-13
Granted
1986-12-09
Kind
A