IP Library › Granted Patent US 5,143,049
Granted Patent Utility
US 5,143,049 · App. 07/498,711

Pump for secondary circulation

Inventors: Karsten Laing, Nikolaus Laing
Patented Case View Patent ↗
Granted: Sep 1, 1992 Filed: Mar 26, 1990
Inventors
Karsten Laing
Nikolaus Laing

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 5,143,049
App. No.
07/498,711
Filed
1990-03-26
Granted
1992-09-01
Kind
A