Granted Patent
Utility
US 6,681,639 · App. 10/120,416
Method of estimating the lifetime of thermal barrier coatings
Inventors:
Otto Bernhardi, Roland Muecke, Hans Joachim Schmutzler, Christoph Sommer, Marianne Sommer
Patented Case
View Patent ↗
Granted: Jan 27, 2004
Filed: Apr 12, 2002
Inventors
Otto Bernhardi
Roland Muecke
Hans Joachim Schmutzler
Christoph Sommer
Marianne Sommer
Assignee (at issue)
ALSTOM (Switzerland) 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.