Granted Patent
Utility
US 6,546,999 · App. 09/523,386
Flat tubes for heat exchanger
Inventors:
Bernd Dienhart, Hans-Joachim Krauss, Hagen Mittelstrass, Karl-Heinz Staffa, Christoph Walter, Jochen Schumm
Patented Case
View Patent ↗
Granted: Apr 15, 2003
Filed: Mar 10, 2000
Inventors
Bernd Dienhart
Hans-Joachim Krauss
Hagen Mittelstrass
Karl-Heinz Staffa
Christoph Walter
Jochen Schumm
Assignee (at issue)
Visteon Global Technologies, 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.