Granted Patent
Utility
US 5,180,451 · App. 07/672,168
Process for the production of longitudinally-directed coarse-grained columnar crystals in a workpiece consisting of an oxide-dispersion-hardened nickel-based superalloy
Inventor:
Mohamed Nazmy
Patented Case
View Patent ↗
Granted: Jan 19, 1993
Filed: Mar 19, 1991
Inventor
Mohamed Nazmy
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.