Granted Patent
Utility
US 6,414,199 · App. 09/719,169
Method of producing bisphenol A
Inventor:
Tetsuya Saruwatari
Patented Case
View Patent ↗
Granted: Jul 2, 2002
Filed: Dec 13, 2000
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.