Granted Patent
Utility
US 4,831,071 · App. 07/099,185
Enhanced melt extrusion of thermoplastics containing silicone interpenetrating polymer networks
Inventors:
Susan K. Ward, Gregory S. O'Brien
Patented Case
View Patent ↗
Granted: May 16, 1989
Filed: Sep 21, 1987
Inventors
Susan K. Ward
Gregory S. O'Brien
Assignee (at issue)
ICI Americas, Inc.
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.