IP Library › Granted Patent US 5,328,608
Granted Patent Utility
US 5,328,608 · App. 07/889,176

Mutli-lateral filter underdrain block

Inventors: Eugen O. Bergmann, Marvin A. Brown
Patented Case View Patent ↗
Granted: Jul 12, 1994 Filed: May 27, 1992
Inventors
Eugen O. Bergmann
Marvin A. Brown
Assignee (at issue)
THE F.B. LEOPOLD COMPANY 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 5,328,608
App. No.
07/889,176
Filed
1992-05-27
Granted
1994-07-12
Kind
A