Granted Patent
Utility
US 4,996,294 · App. 07/429,673
Preparation of aminotetramines
Inventors:
Michael Cuscurida, Wei-Yang Su, George P. Speranza
Patented Case
View Patent ↗
Granted: Feb 26, 1991
Filed: Oct 31, 1989
Inventors
Michael Cuscurida
Wei-Yang Su
George P. Speranza
Assignee (at issue)
Texaco Chemical 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.