Granted Patent
Utility
US 6,696,525 · App. 10/182,777
Process for producing polymer composition
Inventor:
Norio Tomotsu
Patented Case
View Patent ↗
Granted: Feb 24, 2004
Filed: Aug 1, 2002
Inventor
Norio Tomotsu
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.