Granted Patent
Utility
US 5,179,171 · App. 07/831,755
Random copolymer, and process for production thereof
Inventors:
Syuji Minami, Hirokazu Kajiura, Hidekuni Oda, Hideaki Yamaguchi
Patented Case
View Patent ↗
Granted: Jan 12, 1993
Filed: Feb 10, 1992
Inventors
Syuji Minami
Hirokazu Kajiura
Hidekuni Oda
Hideaki Yamaguchi
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.