Granted Patent
Utility
US 5,217,158 · App. 07/914,204
Process for thermodynamically treating a region joining two members
Inventors:
William D. Spiegelberg, John O. Ratka, Clarence S. Lorenz
Patented Case
View Patent ↗
Granted: Jun 8, 1993
Filed: Jul 14, 1992
Inventors
William D. Spiegelberg
John O. Ratka
Clarence S. Lorenz
Assignee (at issue)
BRUSH WELLMAN, 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.