Granted Patent
Utility
US 4,868,346 · App. 06/794,666
Removal of water from aqueous alcohol mixtures
Inventor:
Donald L. Kiser
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Nov 4, 1985
Inventor
Donald L. Kiser
Assignee (at issue)
Grain Processing Corporation
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.