Granted Patent
Utility
US 6,403,264 · App. 09/468,180
Lead/sulphuric acid-accumulator, separator for lead/sulphuric acid accumulators and process to reduce the formation of colored deposits in a lead/sulphuric acid accumulators
Inventors:
Hellmut Bunsch, Klaus Heinrich Ihmels, Frank Otto Theubert
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: Dec 21, 1999
Inventors
Hellmut Bunsch
Klaus Heinrich Ihmels
Frank Otto Theubert
Assignee (at issue)
DARAMIC, 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.