Granted Patent
Utility
US 6,734,220 · App. 10/229,334
Fine cell, high density viscoelastic polyurethane foams
Inventors:
Beat Niederoest, Chiu Y. Chan, Robert Mohr
Patented Case
View Patent ↗
Granted: May 11, 2004
Filed: Aug 27, 2002
Inventors
Beat Niederoest
Chiu Y. Chan
Robert Mohr
Assignee (at issue)
FOAMEX L.P.
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.