Granted Patent
Utility
US 4,298,460 · App. 06/133,082
Process for processing sulfur-containing heavy oil
Inventors:
Kuniaki Fujimori, Teruo Suzuka, Yukio Inoue, Shirou Aizawa
Patented Case
View Patent ↗
Granted: Nov 3, 1981
Filed: Mar 24, 1980
Inventors
Kuniaki Fujimori
Teruo Suzuka
Yukio Inoue
Shirou Aizawa
Assignee (at issue)
Nippon Mining 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.