Granted Patent
Utility
US 4,822,921 · App. 07/168,064
Method for one-step synthesis of methyl t-butyl ether
Inventors:
John F. Knifton, Neal J. Grice
Patented Case
View Patent ↗
Granted: Apr 18, 1989
Filed: Mar 14, 1988
Inventors
John F. Knifton
Neal J. Grice
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.