Granted Patent
Utility
US 4,448,896 · App. 06/384,626
Hydrogenation catalyst for desulfurization and removal of heavy metals
Inventors:
Yoichi Kageyama, Kazuhiko Onuma, Toshihiro Kawakami, Makoto Suzuki
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Jun 3, 1982
Inventors
Yoichi Kageyama
Kazuhiko Onuma
Toshihiro Kawakami
Makoto Suzuki
Assignees (at issue)
Mitsubishi Chemical Inds. Ltd.
Asia Oil Company Limited
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.