Granted Patent
Utility
US 5,322,919 · App. 07/796,055
Process for producing a polycarbonate in inert solvent
Inventors:
Kouichi Kurosawa, Shigeki Kuze, Noriyuki Kunishi, Masaya Okamoto
Patented Case
View Patent ↗
Granted: Jun 21, 1994
Filed: Nov 20, 1991
Inventors
Kouichi Kurosawa
Shigeki Kuze
Noriyuki Kunishi
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.