Granted Patent
Utility
US 6,773,796 · App. 09/806,812
Thermoformable multi-layer polypropylene foam sheet
Inventors:
Gregorio Di Cesare, Renato Angelo Colnaghi
Patented Case
View Patent ↗
Granted: Aug 10, 2004
Filed: Jul 2, 2001
Inventors
Gregorio Di Cesare
Renato Angelo Colnaghi
Assignee (at issue)
Cryovac, 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.