Granted Patent
Utility
US 6,331,589 · App. 09/442,220
Organic polymers containing polyethylene or polystyrene polysiloxane diblock copolymers as melt processing aids
Inventor:
Ronald J. Hoxmeier
Patented Case
View Patent ↗
Granted: Dec 18, 2001
Filed: Nov 17, 1999
Inventor
Ronald J. Hoxmeier
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.