Granted Patent
Utility
US 5,322,882 · App. 08/006,177
Polycarbonate/polyorganosiloxane composition
Inventor:
Masaya Okamoto
Patented Case
View Patent ↗
Granted: Jun 21, 1994
Filed: Jan 15, 1993
Inventor
Masaya Okamoto
Assignee (at issue)
Idemitsu Petrochemical Co., Ltd.
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.