Granted Patent
Utility
US 6,340,645 · App. 09/389,062
Intumescent laminates with high heat transfer resistance
Inventors:
Heinz Horacek, Stefan Pieh
Patented Case
View Patent ↗
Granted: Jan 22, 2002
Filed: Sep 2, 1999
Inventors
Heinz Horacek
Stefan Pieh
Assignee (at issue)
DSM Fine Chemicals Austria NFG GmbH & Co KG
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.