Granted Patent
Utility
US 5,349,043 · App. 08/069,598
Polycarbonate and process for producing the same
Inventors:
Shigeki Kuze, Ryozo Okumura, Noriyuki Kunishi
Patented Case
View Patent ↗
Granted: Sep 20, 1994
Filed: Jun 1, 1993
Inventors
Shigeki Kuze
Ryozo Okumura
Noriyuki Kunishi
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.