IP Library › Granted Patent US 5,806,238
Granted Patent Utility
US 5,806,238 · App. 08/712,827

Biological vacuum device to enhance environmental quality

Inventors: Richard J. Brenner, David E. Milne, Stoy A. Hedges
Patented Case View Patent ↗
Granted: Sep 15, 1998 Filed: Sep 12, 1996
Inventors
Richard J. Brenner
David E. Milne
Stoy A. Hedges
Assignee (at issue)
The United States of America, as represented by the Secretary of the Agriculture

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 5,806,238
App. No.
08/712,827
Filed
1996-09-12
Granted
1998-09-15
Kind
A