Granted Patent
Utility
US 5,658,998 · App. 08/407,045
Random copolymer, and process and production thereof
Inventors:
Syuji Minami, Hirokazu Kajiura, Hidekuni Oda
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Mar 17, 1995
Inventors
Syuji Minami
Hirokazu Kajiura
Hidekuni Oda
Assignee (at issue)
Mitsui Petrochemical Industries, 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.