Granted Patent
Utility
US 4,190,437 · App. 06/006,715
Low thermal expansion nickel-iron base alloy
Inventors:
William J. Boesch, Gernant E. Maurer
Patented Case
View Patent ↗
Granted: Feb 26, 1980
Filed: Jan 26, 1979
Inventors
William J. Boesch
Gernant E. Maurer
Assignee (at issue)
SPECIAL METALS 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.