Granted Patent
Utility
US 5,844,010 · App. 08/869,550
Method of preparing polyurethane foam utilizing block copolymers having linked siloxane blocks
Inventors:
Georg Burkhart, Rolf-Dieter Langenhagen, Andreas Weier
Patented Case
View Patent ↗
Granted: Dec 1, 1998
Filed: Jun 5, 1997
Inventors
Georg Burkhart
Rolf-Dieter Langenhagen
Andreas Weier
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.