Granted Patent
Utility
US 4,818,486 · App. 07/141,742
Low thermal expansion superalloy
Inventors:
Michael F. Rothman, Hani M. Tawancy
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: Jan 11, 1988
Inventors
Michael F. Rothman
Hani M. Tawancy
Assignee (at issue)
Haynes International, Inc.
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.