Granted Patent
Utility
US 4,634,044 · App. 06/784,431
Process for restricted lead content soldering of copper fins to copper alloy tubing with controlled copper contamination of the molten solder reservoir
Inventors:
Homer G. Hargrove, Jay L. Kratz, Raymond A. Sabatino, Perry A. Weyant
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Oct 4, 1985
Inventors
Homer G. Hargrove
Jay L. Kratz
Raymond A. Sabatino
Perry A. Weyant
Assignee (at issue)
Westinghouse Electric Company 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.