Granted Patent
Utility
US 5,459,225 · App. 08/251,287
Process for producing polycarbonate having reduced residual chloroformate therein
Inventors:
Shigeki Kuze, Ryozo Okumura, Yoshinobu Suwabe
Patented Case
View Patent ↗
Granted: Oct 17, 1995
Filed: May 31, 1994
Inventors
Shigeki Kuze
Ryozo Okumura
Yoshinobu Suwabe
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.