Granted Patent
Utility
US 6,228,947 · App. 09/490,200
Deprotection of polymers prepared with silyloxy protected functional initiators by reaction with aqueous fluoroboric acid
Inventor:
David K. Schisla
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Jan 24, 2000
Inventor
David K. Schisla
Assignee (at issue)
SHELL OIL 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.