Granted Patent
Utility
US 6,143,439 · App. 09/232,517
End cap assembly for an electrochemical cell
Inventors:
Robert A. Yoppolo, Sean A. Sargeant, Marian Wiacek
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Jan 19, 1999
Inventors
Robert A. Yoppolo
Sean A. Sargeant
Marian Wiacek
Assignee (at issue)
Duracell 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.