Granted Patent
Utility
US 6,069,220 · App. 09/225,237
Continuous method for producing polyorganosiloxanes
Inventors:
Sabine Hoffmann, Klaus Kaeppler
Patented Case
View Patent ↗
Granted: May 30, 2000
Filed: Jan 4, 1999
Inventors
Sabine Hoffmann
Klaus Kaeppler
Assignee (at issue)
Huels Silicone GmbH
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.