Granted Patent
Utility
US 5,214,217 · App. 07/917,218
Method for one-step synthesis of methyl t-butyl ether
Inventor:
John F. Knifton
Patented Case
View Patent ↗
Granted: May 25, 1993
Filed: Jul 22, 1992
Inventor
John F. Knifton
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.