IP Library › Granted Patent US 4,953,271
Granted Patent Utility
US 4,953,271 · App. 07/410,311

Intermingling nozzle

Inventors: Herbert Wellenhofer, Ingolf Jacob, Josef Geirhos
Patented Case View Patent ↗
Granted: Sep 4, 1990 Filed: Sep 20, 1989
Inventors
Herbert Wellenhofer
Ingolf Jacob
Josef Geirhos
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 4,953,271
App. No.
07/410,311
Filed
1989-09-20
Granted
1990-09-04
Kind
A