Granted Patent
Utility
US 5,596,067 · App. 08/530,274
Free fall polymerization process for the production of polycarbonates
Inventors:
Kyosuke Komiya, Yoshifumi Kawakami, Hiroshige Okamoto
Patented Case
View Patent ↗
Granted: Jan 21, 1997
Filed: Sep 1, 1995
Inventors
Kyosuke Komiya
Yoshifumi Kawakami
Hiroshige Okamoto
Assignee (at issue)
ASAHI KASEI KOGYO 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.