Granted Patent
Utility
US 6,379,751 · App. 09/734,400
Imparting water-repellency with polysiloxanes containing carboxyl groups
Inventors:
Walter Schafer, Gunter Sackmann, Jurgen Reiners, Tillmann Hassel, Manfred Schnee, Fritz Novotny
Patented Case
View Patent ↗
Granted: Apr 30, 2002
Filed: Dec 11, 2000
Inventors
Walter Schafer
Gunter Sackmann
Jurgen Reiners
Tillmann Hassel
Manfred Schnee
Fritz Novotny
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.