Granted Patent
Utility
US 6,479,689 · App. 09/857,980
Process for continuously producing dialkyl carbonate and diol
Inventors:
Masahiro Tojo, Kazuhiro Oonishi
Patented Case
View Patent ↗
Granted: Nov 12, 2002
Filed: Jun 11, 2001
Inventors
Masahiro Tojo
Kazuhiro Oonishi
Assignee (at issue)
ASAHI KASEI KABUSHIKI KAISHA
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.