Granted Patent
Utility
US 4,323,403 · App. 06/060,028
Continuous annealing method for cold reduced steel strip
Inventors:
Kazuhide Nakaoka, Kenzi Araki, Kozi Iwase, Haruo Kubotera, Takao Kurihara, Nobuo Tanaka
Patented Case
View Patent ↗
Granted: Apr 6, 1982
Filed: Jul 23, 1979
Inventors
Kazuhide Nakaoka
Kenzi Araki
Kozi Iwase
Haruo Kubotera
Takao Kurihara
Nobuo Tanaka
Assignee (at issue)
Nippon Kokan Co., 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.