Granted Patent
Utility
US 6,512,148 · App. 09/937,401
Process for the production of bisphenol A
Inventors:
Susumu Yamamoto, Atsumi Kukidome, Makoto Nomura, Keiji Maehara, Kenji Nagahama
Patented Case
View Patent ↗
Granted: Jan 28, 2003
Filed: Sep 26, 2001
Inventors
Susumu Yamamoto
Atsumi Kukidome
Makoto Nomura
Keiji Maehara
Kenji Nagahama
Assignee (at issue)
MITSUBISHI CHEMICAL CORPORATION
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.