Granted Patent
Utility
US 5,430,001 · App. 08/112,322
Process for producing a styrene polymer and a catalyst for use therein
Inventors:
Norio Tomotsu, Mizutomo Takeuchi, Masahiko Kuramoto
Patented Case
View Patent ↗
Granted: Jul 4, 1995
Filed: Aug 27, 1993
Inventors
Norio Tomotsu
Mizutomo Takeuchi
Masahiko Kuramoto
Assignee (at issue)
IDEMITSU KOSAN 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.