Granted Patent
Utility
US 6,486,272 · App. 09/926,788
Process for producing functional styrene copolymer
Inventors:
Tetsuya Inoue, Masanori Sera
Patented Case
View Patent ↗
Granted: Nov 26, 2002
Filed: Dec 19, 2001
Inventors
Tetsuya Inoue
Masanori Sera
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.