Granted Patent
Utility
US 5,488,086 · App. 08/209,591
Polycarbonate resin composition
Inventors:
Takashi Umeda, Masaya Okamoto
Patented Case
View Patent ↗
Granted: Jan 30, 1996
Filed: Mar 10, 1994
Inventors
Takashi Umeda
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.