Granted Patent
Utility
US 5,473,046 · App. 08/318,259
Process for producing a branched polycarbonate
Inventors:
Shigeki Kuze, Ryozo Okumura, Seiji Takahashi
Patented Case
View Patent ↗
Granted: Dec 5, 1995
Filed: Oct 5, 1994
Inventors
Shigeki Kuze
Ryozo Okumura
Seiji Takahashi
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.