Granted Patent
Utility
US 5,281,478 · App. 07/984,747
Method for modifying the surface of finely divided particles by the application of organofunctional polysiloxanes
Inventors:
Werner Hohner, Dietmar Schaefer
Patented Case
View Patent ↗
Granted: Jan 25, 1994
Filed: Dec 3, 1992
Inventors
Werner Hohner
Dietmar Schaefer
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.