Granted Patent
Utility
US 5,166,393 · App. 07/771,538
Process for producing diaryl carbonate
Inventors:
Shinsuke Fukuoka, Ryoji Deguchi, Masahiro Tojo
Patented Case
View Patent ↗
Granted: Nov 24, 1992
Filed: Oct 7, 1991
Inventors
Shinsuke Fukuoka
Ryoji Deguchi
Masahiro Tojo
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.