Granted Patent
Utility
US 5,424,482 · App. 07/742,780
Process for preparing color-stable tertiary butyldiethanolamine
Inventors:
Thomas H. Overgaard, Louis P. Verduce
Patented Case
View Patent ↗
Granted: Jun 13, 1995
Filed: Aug 8, 1991
Inventors
Thomas H. Overgaard
Louis P. Verduce
Assignee (at issue)
ELF Atochem N.A., 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.