Granted Patent
Utility
US 5,243,091 · App. 07/978,570
Method for the manufacture and recovery of methyl tertiary butyl ether
Inventors:
Charles J. Kruse, Rei-Yu J. Hwan, Kyle Preston, Feng-Ran Sheu
Patented Case
View Patent ↗
Granted: Sep 7, 1993
Filed: Nov 19, 1992
Inventors
Charles J. Kruse
Rei-Yu J. Hwan
Kyle Preston
Feng-Ran Sheu
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.