Granted Patent
Utility
US 5,688,908 · App. 08/631,782
Process for the preparation of aromatic sulfur-containing polymers
Inventors:
Michael Haubs, Andreas Schleicher, Thorsten Niklas
Patented Case
View Patent ↗
Granted: Nov 18, 1997
Filed: Apr 12, 1996
Inventors
Michael Haubs
Andreas Schleicher
Thorsten Niklas
Assignee (at issue)
Hoechst 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.