Granted Patent
Utility
US 5,300,567 · App. 07/998,206
Low temperature toughening of polyesters with a modified block copolymer
Inventor:
Michael J. Modic
Patented Case
View Patent ↗
Granted: Apr 5, 1994
Filed: Dec 30, 1992
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.