Granted Patent
Utility
US 6,001,470 · App. 08/979,856
Calcining tool material and method of fabricating thereof
Inventors:
Shigeki Niwa, Tadashi Kimura, Hiroshi Okada, Toshiyuki Suzuki, Kenithi Urathuji, Ataru Nishikawa, Mamoru Uemura
Patented Case
View Patent ↗
Granted: Dec 14, 1999
Filed: Nov 26, 1997
Inventors
Shigeki Niwa
Tadashi Kimura
Hiroshi Okada
Toshiyuki Suzuki
Kenithi Urathuji
Ataru Nishikawa
Mamoru Uemura
Assignee (at issue)
Toshiba Ceramics 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.