Granted Patent
Utility
US 5,449,839 · App. 08/279,057
One step synthesis of ethyl t-butyl ether from t-butanol using .beta.-zeolite and multimetal-modified .beta.-zeolite catalysts
Inventors:
John F. Knifton, Pei-Shing E. Dai
Patented Case
View Patent ↗
Granted: Sep 12, 1995
Filed: Jul 22, 1994
Inventors
John F. Knifton
Pei-Shing E. Dai
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.