Granted Patent
Utility
US 5,491,263 · App. 08/171,039
Aminoethylation process for production of substituted ethylene diamines
Inventors:
Peter C. Rooney, Michael O. Nutt
Patented Case
View Patent ↗
Granted: Feb 13, 1996
Filed: Dec 21, 1993
Inventors
Peter C. Rooney
Michael O. Nutt
Assignee (at issue)
THE DOW CHEMICAL COMPANY
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.