IP Library › Granted Patent US 4,236,990
Granted Patent Utility
US 4,236,990 · App. 06/042,775

Treater with self-cleaning electrodes

Inventor: Arthur S. King
Patented Case View Patent ↗
Granted: Dec 2, 1980 Filed: May 29, 1979
Inventor
Arthur S. King

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 4,236,990
App. No.
06/042,775
Filed
1979-05-29
Granted
1980-12-02
Kind
A