Granted Patent
Utility
US 6,602,593 · App. 09/385,933
Battery separators with reduced splitting propensity
Inventors:
Robert W. Callahan, Ron W. Call, Ken J. Harleson, Ta-Hua Yu
Patented Case
View Patent ↗
Granted: Aug 5, 2003
Filed: Aug 30, 1999
Inventors
Robert W. Callahan
Ron W. Call
Ken J. Harleson
Ta-Hua Yu
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.