Granted Patent
Utility
US 6,242,554 · App. 09/439,409
Polysiloxanes having polyether quat functions
Inventors:
Stephan Busch, Manfred Krakenberg, Peter Lersch, Stephan Stadtmuller
Patented Case
View Patent ↗
Granted: Jun 5, 2001
Filed: Nov 11, 1999
Inventors
Stephan Busch
Manfred Krakenberg
Peter Lersch
Stephan Stadtmuller
Assignee (at issue)
Th. Goldschmidt. AG
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.