Granted Patent
Utility
US 4,334,937 · App. 06/162,612
Process for improving decarburization resistance of chrome-molybdenum steel in sodium
Inventors:
Shunichi Yuhara, Naruo Hasegawa, Takashi Nakasuji, Norichika Aoki
Patented Case
View Patent ↗
Granted: Jun 15, 1982
Filed: Jun 24, 1980
Inventors
Shunichi Yuhara
Naruo Hasegawa
Takashi Nakasuji
Norichika Aoki
Assignee (at issue)
Doryokuro Kakunenryo Kaihatsu Jigyodan
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.