Granted Patent
Utility
US 6,140,533 · App. 09/077,750
Process for producing sec-butyl acrylate
Inventor:
Masahiro Iwahara
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: Jul 11, 1998
Inventor
Masahiro Iwahara
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.