Granted Patent
Utility
US 6,608,234 · App. 10/204,004
Process for producing bisphenol A
Inventor:
Tetsuya Saruwatari
Patented Case
View Patent ↗
Granted: Aug 19, 2003
Filed: Aug 16, 2002
Inventor
Tetsuya Saruwatari
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.