Granted Patent
Utility
US 4,655,853 · App. 06/724,498
Method for making powder metal forging preforms of high-strength ferrous-base alloys
Inventors:
Larry Byrnes, Jon T. Gabrielsen
Patented Case
View Patent ↗
Granted: Apr 7, 1987
Filed: Apr 18, 1985
Inventors
Larry Byrnes
Jon T. Gabrielsen
Assignee (at issue)
Federal-Mogul LLC
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.