Granted Patent
Utility
US 4,775,447 · App. 06/621,814
Process for the production of 2,2-dimethoxypropane
Inventors:
Chao-Yang Hsu, Paul E. Ellis, Jr.
Patented Case
View Patent ↗
Granted: Oct 4, 1988
Filed: Jun 18, 1984
Inventors
Chao-Yang Hsu
Paul E. Ellis, Jr.
Assignee (at issue)
Sun Refining and Marketing Company
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.