IP Library Granted Patent US 4,635,839
Granted Patent Utility
US 4,635,839 · App. 06/581,504

Welding carriage

Inventor: Clyde M. Slavens
Patented Case View Patent ↗
Granted: Jan 13, 1987 Filed: Feb 17, 1984
Inventor
Clyde M. Slavens
Assignee (at issue)
CRC-EVANS PIPELINE INTERNATIONAL, 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 4,635,839
App. No.
06/581,504
Filed
1984-02-17
Granted
1987-01-13
Kind
A