Granted Patent
Utility
US 6,426,381 · App. 09/622,136
Fine-particle polymer dispersions for paper sizing
Inventors:
Joachim Konig, Eckhard Wenz, Gunter Sackmann, Thomas Roick, Bernd Thiele, Gabriele Kinkel, Johan Kijlstra, Bernd Hauschel
Patented Case
View Patent ↗
Granted: Jul 30, 2002
Filed: Aug 11, 2000
Inventors
Joachim Konig
Eckhard Wenz
Gunter Sackmann
Thomas Roick
Bernd Thiele
Gabriele Kinkel
Johan Kijlstra
Bernd Hauschel
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.