Granted Patent
Utility
US 5,630,314 · App. 08/320,780
Thermal stress relaxation type ceramic coated heat-resistant element
Inventors:
Yoshitaka Kojima, Hideyuki Arikawa, Mitsuo Haginoya, Akira Mebata, Tetsuo Sasada, Hajime Toriya
Patented Case
View Patent ↗
Granted: May 20, 1997
Filed: Oct 11, 1994
Inventors
Yoshitaka Kojima
Hideyuki Arikawa
Mitsuo Haginoya
Akira Mebata
Tetsuo Sasada
Hajime Toriya
Assignee (at issue)
HITACHI, 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.