Granted Patent
Utility
US 4,906,687 · App. 07/140,076
Blends of polar thermoplastic polymers and modified block copolymers
Inventor:
Michael J. Modic
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Dec 31, 1987
Inventor
Michael J. Modic
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.