Granted Patent
Utility
US 5,338,890 · App. 08/092,963
One step synthesis of methyl t-butyl ether from t-butanol using alkylsulfonic acid-modified oxide catalysts
Inventors:
John F. Knifton, John R. Sanderson
Patented Case
View Patent ↗
Granted: Aug 16, 1994
Filed: Jul 19, 1993
Inventors
John F. Knifton
John R. Sanderson
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.