Granted Patent
Utility
US 4,276,153 · App. 06/108,583
Process for thermal cracking of hydrocarbons and apparatus therefor
Inventors:
Masami Yoshitake, Fumiaki Yamaguchi
Patented Case
View Patent ↗
Granted: Jun 30, 1981
Filed: Dec 31, 1979
Inventors
Masami Yoshitake
Fumiaki Yamaguchi
Assignees (at issue)
Mitsui Engineering & Shipbuilding Co., Ltd.
Mitsui Petrochemical 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.