Granted Patent
Utility
US 5,093,451 · App. 07/556,720
Formed organosiloxane amine copolycondensates method of their preparation and use
Inventors:
Peter Panster, Stefan Wieland
Patented Case
View Patent ↗
Granted: Mar 3, 1992
Filed: Jul 25, 1990
Inventors
Peter Panster
Stefan Wieland
Assignee (at issue)
Degussa 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.