Granted Patent
Utility
US 4,502,213 · App. 06/289,996
Apparatus for the automatic closure of electrochemical cells
Inventors:
James A. Madden, Kenneth C. LeDuc
Patented Case
View Patent ↗
Granted: Mar 5, 1985
Filed: Aug 4, 1981
Inventors
James A. Madden
Kenneth C. LeDuc
Assignee (at issue)
General Electric Company
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.