Granted Patent
Utility
US 5,208,311 · App. 07/825,393
Organopolysiloxanes with polyether and ester groups linked to a common spacer group
Inventors:
Dietmar Schaefer, Andreas Weier, Dietmar Wewers
Patented Case
View Patent ↗
Granted: May 4, 1993
Filed: Jan 24, 1992
Inventors
Dietmar Schaefer
Andreas Weier
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.