Granted Patent
Utility
US 6,046,285 · App. 08/923,028
Polymer blends containing sulfoxide groups
Inventor:
Helmut Scheckenbach
Patented Case
View Patent ↗
Granted: Apr 4, 2000
Filed: Sep 3, 1997
Inventor
Helmut Scheckenbach
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.