Granted Patent
Utility
US 6,339,110 · App. 08/872,317
Process for rigid polyurethane foams
Inventors:
Andrea Cappella, Werner Hoffmann, Silvio Barettini, Maria Vittoria Franco, Walter Bazzo
Patented Case
View Patent ↗
Granted: Jan 15, 2002
Filed: Jun 10, 1997
Inventors
Andrea Cappella
Werner Hoffmann
Silvio Barettini
Maria Vittoria Franco
Walter Bazzo
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.