Granted Patent
Utility
US 6,168,380 · App. 09/111,874
Cooling system for the leading-edge region of a hollow gas-turbine blade
Inventor:
Bernhard Weigand
Patented Case
View Patent ↗
Granted: Jan 2, 2001
Filed: Jul 8, 1998
Inventor
Bernhard Weigand
Assignee (at issue)
Asea Brown Boveri, S.A.
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.