Granted Patent
Utility
US 6,448,448 · App. 09/424,981
Process for the non-oxidative preparation of formaldehyde from methanol
Inventors:
Elke Schweers, Rolf Schulz, Thomas Kaiser, Uwe Dingerdissen
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Feb 22, 2000
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.