IP Library › Granted Patent US 5,967,699
Granted Patent Utility
US 5,967,699 · App. 08/934,467

Method and apparatus for launching a pig in a vertical riser pipe

Inventor: Kenneth M. Knapp
Patented Case View Patent ↗
Granted: Oct 19, 1999 Filed: Sep 19, 1997
Inventor
Kenneth M. Knapp

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 5,967,699
App. No.
08/934,467
Filed
1997-09-19
Granted
1999-10-19
Kind
A