Granted Patent
Utility
US 6,653,487 · App. 10/176,997
Process for preparing trioxane, polyoxymethylene and polyoxymethylene copolymers
Inventors:
Elke Schweers, Rolf Schulz, Thomas Kaiser, Uwe Dingerdissen
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Jun 21, 2002
Inventors
Elke Schweers
Rolf Schulz
Thomas Kaiser
Uwe Dingerdissen
Assignee (at issue)
Ticona LLC
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.