Granted Patent
Utility
US 4,686,775 · App. 06/790,848
Absorbent drying method by contacting with a hydrocarbon
Inventor:
Dennis A. Vauk
Patented Case
View Patent ↗
Granted: Aug 18, 1987
Filed: Oct 24, 1985
Inventor
Dennis A. Vauk
Assignee (at issue)
Union Oil Company of California
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.