Granted Patent
Utility
US 6,689,834 · App. 09/948,451
Liquid sulfur-containing oligosiloxanes and their use in rubber mixtures
Inventors:
Jurgen Ackermann, Hermann-Josef Weidenhaupt, Stefan Peter Grabowski
Patented Case
View Patent ↗
Granted: Feb 10, 2004
Filed: Sep 7, 2001
Inventors
Jurgen Ackermann
Hermann-Josef Weidenhaupt
Stefan Peter Grabowski
Assignee (at issue)
Bayer Aktiengesellschaft
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.