Granted Patent
Utility
US 5,693,718 · App. 08/553,947
Block copolymers having improved combinations of properties
Inventors:
Hendrik de Groot, Karel Hendrik Leffelaar, Jacqueline M. Veurink, Jeroen Van Westrenen
Patented Case
View Patent ↗
Granted: Dec 2, 1997
Filed: Nov 6, 1995
Inventors
Hendrik de Groot
Karel Hendrik Leffelaar
Jacqueline M. Veurink
Jeroen Van Westrenen
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.