Granted Patent
Utility
US 5,262,228 · App. 07/714,234
Ethylene/pentene-1 copolymer compositions and their use
Inventors:
Masaki Kohyama, Masaya Yamada
Patented Case
View Patent ↗
Granted: Nov 16, 1993
Filed: Jun 12, 1991
Inventors
Masaki Kohyama
Masaya Yamada
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.