Granted Patent
Utility
US 5,891,977 · App. 08/082,384
Organopolysiloxanes comprising polyhydroxyorganyl radicals and polyoxyalkylene radicals
Inventors:
Thomas Dietz, Burghard Gruning, Peter Lersch, Christian Weitemeyer
Patented Case
View Patent ↗
Granted: Apr 6, 1999
Filed: May 20, 1998
Inventors
Thomas Dietz
Burghard Gruning
Peter Lersch
Christian Weitemeyer
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.