Granted Patent
Utility
US 4,285,751 · App. 06/127,172
Method of forming an improved battery separator
Inventors:
Stewart Carl Feinberg, Christian B. Lundsager, Joseph T. Lundquist, Robert A. Balouskus
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: Feb 29, 1980
Inventors
Stewart Carl Feinberg
Christian B. Lundsager
Joseph T. Lundquist
Robert A. Balouskus
Assignee (at issue)
W. R. Grace & Co.
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.