Granted Patent
Utility
US 5,336,747 · App. 07/961,854
Random 1-butene/ethylene copolymer
Inventors:
Masaki Kohyama, Takeshi Muranaka, Kunisuke Fukui, Norio Kashiwa
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Oct 16, 1992
Inventors
Masaki Kohyama
Takeshi Muranaka
Kunisuke Fukui
Norio Kashiwa
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.