Granted Patent
Utility
US 5,281,687 · App. 07/987,853
Polysiloxanes with at least one sulfatohexyl group linked by an Si-C bond
Inventors:
Stefan Busch, Peter Lersch, Dietmar Schaefer, Dietmar Wewers
Patented Case
View Patent ↗
Granted: Jan 25, 1994
Filed: Dec 9, 1992
Inventors
Stefan Busch
Peter Lersch
Dietmar Schaefer
Dietmar Wewers
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.