Granted Patent
Utility
US 6,146,478 · App. 08/955,631
Heat treatment process for material bodies made of a high-temperature-resistant iron-nickel superalloy, and heat-treatment material body
Inventors:
Werner Balbach, Gunnar Harkegård, Reiner Redecker
Patented Case
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Granted: Nov 14, 2000
Filed: Oct 22, 1997
Inventors
Werner Balbach
Gunnar Harkegård
Reiner Redecker
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.