Granted Patent
Utility
US 4,994,236 · App. 07/311,412
Method of making high melting point alloys
Inventors:
John R. Mihalisin, Michelle K. Tripucka
Patented Case
View Patent ↗
Granted: Feb 19, 1991
Filed: Feb 15, 1989
Inventors
John R. Mihalisin
Michelle K. Tripucka
Assignee (at issue)
HOWMET 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.