Granted Patent
Utility
US 5,543,449 · App. 08/419,310
Stabilized flexible PVC
Inventors:
Rolf Drewes, Markus Kolb, Karl-Josef Kuhn, Hans Sander, Wolfgang Wehner
Patented Case
View Patent ↗
Granted: Aug 6, 1996
Filed: Apr 10, 1995
Inventors
Rolf Drewes
Markus Kolb
Karl-Josef Kuhn
Hans Sander
Wolfgang Wehner
Assignee (at issue)
Ciba-Geigy
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.