Granted Patent
Utility
US 6,180,280 · App. 09/041,163
Trilayer battery separator
Inventor:
Robert M. Spotnitz
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Mar 12, 1998
Inventor
Robert M. Spotnitz
Assignee (at issue)
Celgard, 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.