Granted Patent
Utility
US 6,204,323 · App. 09/312,111
Aqueous two-component polyurethane coating compositions
Inventors:
Christian Wamprecht, Hans-Josef Laas
Patented Case
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Granted: Mar 20, 2001
Filed: May 14, 1999
Inventors
Christian Wamprecht
Hans-Josef Laas
Assignee (at issue)
Bayer Aktiengesellschaft
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.