Granted Patent
Utility
US 5,120,620 · App. 07/573,106
Binary lead-tin alloy substrate for lead-acid electrochemical cells
Inventors:
Robert F. Nelson, David M. Wisdom
Patented Case
View Patent ↗
Granted: Jun 9, 1992
Filed: Aug 24, 1990
Inventors
Robert F. Nelson
David M. Wisdom
Assignee (at issue)
Gates Energy Products, 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.