IP Library › Granted Patent US 4,229,643
Granted Patent Utility
US 4,229,643 · App. 05/914,360

Consumable welding electrode

Inventor: Robert A. Caldwell
Patented Case View Patent ↗
Granted: Oct 21, 1980 Filed: Jun 12, 1978
Inventor
Robert A. Caldwell
Assignee (at issue)
Allis-Chalmers Corporation

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 4,229,643
App. No.
05/914,360
Filed
1978-06-12
Granted
1980-10-21
Kind
A