Granted Patent
Utility
US 4,236,921 · App. 06/016,968
Heat resistant alloy castings
Inventors:
Bruce A. Heyer, Donald L. Huth
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: Mar 2, 1979
Inventors
Bruce A. Heyer
Donald L. Huth
Assignee (at issue)
Abex Corporation
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.