Granted Patent
Utility
US 5,352,407 · App. 08/052,518
Lead-free bismuth free tin alloy solder composition
Inventors:
Karl Seelig, Donald G. Lockard
Patented Case
View Patent ↗
Granted: Oct 4, 1994
Filed: Apr 29, 1993
Inventors
Karl Seelig
Donald G. Lockard
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.