IP Library › Granted Patent US 5,152,663
Granted Patent Utility
US 5,152,663 · App. 07/579,404

Centrifugal pump

Inventors: Tapio Peroaho, Reijo Vesala, Vesa Vikman
Patented Case View Patent ↗
Granted: Oct 6, 1992 Filed: Sep 7, 1990
Inventors
Tapio Peroaho
Reijo Vesala
Vesa Vikman
Assignee (at issue)
A. Ahlstrom Corporation

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 5,152,663
App. No.
07/579,404
Filed
1990-09-07
Granted
1992-10-06
Kind
A