IP Library Granted Patent US 4,255,357
Granted Patent Utility
US 4,255,357 · App. 06/132,838

Catalytic process for preparing ethyl amines

Inventors: David A. Gardner, Roger T. Clark
Patented Case View Patent ↗
Granted: Mar 10, 1981 Filed: Mar 24, 1980
Inventors
David A. Gardner
Roger T. Clark
Assignee (at issue)
Pennwalt 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 4,255,357
App. No.
06/132,838
Filed
1980-03-24
Granted
1981-03-10
Kind
A