IP Library › Granted Patent US 4,447,400
Granted Patent Utility
US 4,447,400 · App. 06/362,978

Metering device

Inventors: Hans-Werner Stephan, Hermann Klein, Klaus Lehr
Patented Case View Patent ↗
Granted: May 8, 1984 Filed: Mar 29, 1982
Inventors
Hans-Werner Stephan
Hermann Klein
Klaus Lehr
Assignee (at issue)
Hoechst GmbH

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 4,447,400
App. No.
06/362,978
Filed
1982-03-29
Granted
1984-05-08
Kind
A