Granted Patent
Utility
US 4,414,133 · App. 06/342,238
Catalytic composition
Inventors:
Masayuki Otake, Masakatsu Hatano, Toru Koyama, Masayoshi Murayama, Kazunori Oshima
Patented Case
View Patent ↗
Granted: Nov 8, 1983
Filed: Jan 25, 1982
Inventors
Masayuki Otake
Masakatsu Hatano
Toru Koyama
Masayoshi 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.