Granted Patent
Utility
US 4,077,801 · App. 05/824,637
Iron-chromium-nickel heat resistant castings
Inventors:
Bruce A. Heyer, Donald L. Huth
Patented Case
View Patent ↗
Granted: Mar 7, 1978
Filed: Aug 15, 1977
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.