Granted Patent
Utility
US 4,992,602 · App. 07/471,751
Preparation of tertiary butyl alcohol
Inventors:
John R. Sanderson, Edward T. Marquis
Patented Case
View Patent ↗
Granted: Feb 12, 1991
Filed: Jan 29, 1990
Inventors
John R. Sanderson
Edward T. Marquis
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.