Granted Patent
Utility
US 4,655,878 · App. 06/668,930
Method of regulating fuel supply rate for heating a coke oven
Inventors:
Yoshio Yoshino, Koji Tsuchihashi, Yoshihiro Omae, Kenzo Tsujikawa, Takashi Takaoka, Yukio Yamaguchi
Patented Case
View Patent ↗
Granted: Apr 7, 1987
Filed: Nov 7, 1984
Inventors
Yoshio Yoshino
Koji Tsuchihashi
Yoshihiro Omae
Kenzo Tsujikawa
Takashi Takaoka
Yukio Yamaguchi
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.