Granted Patent
Utility
US 4,711,867 · App. 06/833,279
Catalytic composition
Inventors:
Masakatsu Hatano, Kazunori Oshima, Tatsuya Ihara, Kenichi KIYONO
Patented Case
View Patent ↗
Granted: Dec 8, 1987
Filed: Feb 27, 1986
Inventors
Masakatsu Hatano
Kazunori Oshima
Tatsuya Ihara
Kenichi KIYONO
Assignee (at issue)
Mitsubishi Chemical 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.