Granted Patent
Utility
US 4,339,329 · App. 06/128,151
Liquefaction of coal
Inventors:
Yoichi Kageyama, Masato Aiura, Kikuo Moriya
Patented Case
View Patent ↗
Granted: Jul 13, 1982
Filed: Mar 7, 1980
Inventors
Yoichi Kageyama
Masato Aiura
Kikuo Moriya
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.