Granted Patent
Utility
US 4,482,743 · App. 06/518,170
Hydroxyalkyl bis(dialkylaminoalkyl)amine manufacture
Inventors:
Ernest L. Yeakey, Robert L. Zimmerman
Patented Case
View Patent ↗
Granted: Nov 13, 1984
Filed: Jul 28, 1983
Inventors
Ernest L. Yeakey
Robert L. Zimmerman
Assignee (at issue)
Texaco Inc.
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.