Granted Patent
Utility
US 4,341,659 · App. 06/171,242
Catalytic composition
Inventors:
Yoichi Kageyama, Masakatsu Hatano, Toru Koyama, Takao Kaneko, Masayosi Murayama, Kazunori Oshima
Patented Case
View Patent ↗
Granted: Jul 27, 1982
Filed: Jul 22, 1980
Inventors
Yoichi Kageyama
Masakatsu Hatano
Toru Koyama
Takao Kaneko
Masayosi Murayama
Kazunori Oshima
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.