Granted Patent
Utility
US 4,855,509 · App. 07/008,025
Removal of alkali metals from polyols
Inventors:
Shashi B. Dave, Clifford W. Cain, Jr.
Patented Case
View Patent ↗
Granted: Aug 8, 1989
Filed: Jan 28, 1987
Inventors
Shashi B. Dave
Clifford W. Cain, Jr.
Assignee (at issue)
Manville 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.