Granted Patent
Utility
US 4,963,200 · App. 07/338,932
Dispersion strengthened ferritic steel for high temperature structural use
Inventors:
Takanari Okuda, Shigeo Nomura, Itaru Shibahara, Yuji Enokido, Masayuki Fujiwara, Toshio Nishida, Hiroshi Teranishi, Susumu Hirano, Aturou Iseda, Motoharu Nakajima
Patented Case
View Patent ↗
Granted: Oct 16, 1990
Filed: Apr 11, 1989
Inventors
Takanari Okuda
Shigeo Nomura
Itaru Shibahara
Yuji Enokido
Masayuki Fujiwara
Toshio Nishida
Hiroshi Teranishi
Susumu Hirano
Aturou Iseda
Motoharu Nakajima
Assignees (at issue)
Doryokuro Kakunenryo Kaihatsu Jigyodan
KOBE STEEL, LTD.
SUMITOMO METAL 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.