Granted Patent
Utility
US 5,716,996 · App. 08/747,700
Method for the recovery of secondary polyols from paint sludges
Inventors:
Bernd-Uwe Kettemann, Michele Melchiorre
Patented Case
View Patent ↗
Granted: Feb 10, 1998
Filed: Nov 12, 1996
Inventors
Bernd-Uwe Kettemann
Michele Melchiorre
Assignee (at issue)
MERCEDES-BENZ GROUP AG
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.