Granted Patent
Utility
US 5,175,313 · App. 07/695,323
Process for preparing dihydrofuranone derivatives
Inventors:
Junichi Imuta, Aiichiro Ori, Noriaki Kihara
Patented Case
View Patent ↗
Granted: Dec 29, 1992
Filed: May 3, 1991
Inventors
Junichi Imuta
Aiichiro Ori
Noriaki Kihara
Assignee (at issue)
Mitsui Petrochemical Industries, 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.