IP Library › Granted Patent US 6,234,197
Granted Patent Utility
US 6,234,197 · App. 08/717,904

Holding tank vacuum relief

Inventors: Edward McKiernan, James A. Sigler, William J. Friedman
Patented Case View Patent ↗
Granted: May 22, 2001 Filed: Sep 23, 1996
Inventors
Edward McKiernan
James A. Sigler
William J. Friedman
Assignee (at issue)
BellandTechnology AG

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 6,234,197
App. No.
08/717,904
Filed
1996-09-23
Granted
2001-05-22
Kind
A