Granted Patent
Utility
US 5,492,967 · App. 08/305,612
Impact modification of polypropylene with styrene/isoprene tetrablock copolymers
Inventors:
Lie K. Djiauw, Michael J. Modic, Richard Gelles, Glenn R. Himes
Patented Case
View Patent ↗
Granted: Feb 20, 1996
Filed: Sep 14, 1994
Inventors
Lie K. Djiauw
Michael J. Modic
Richard Gelles
Glenn R. Himes
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.