Granted Patent
Utility
US 6,703,449 · App. 10/325,199
Block copolymers containing both polystyrene and low vinyl content polydiene hard blocks
Inventors:
Ronald J. Hoxmeier, Michael A. Masse
Patented Case
View Patent ↗
Granted: Mar 9, 2004
Filed: Dec 20, 2002
Inventors
Ronald J. Hoxmeier
Michael A. Masse
Assignee (at issue)
KRATON POLYMERS LLC
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.