Pipes and tubular conduits – Flexible – Distinct layers
Reexamination Certificate
2006-08-08
2006-08-08
Hook, James (Department: 3754)
Pipes and tubular conduits
Flexible
Distinct layers
C138S141000, C428S036910
Reexamination Certificate
active
07086421
ABSTRACT:
A multilayer PEX pipe having improved resistance to oxidizing agents in water. The pipe has a thin tubular core (inner layer) of high density polyethylene and an outer layer of crosslinked polyethylene. The pipe may optionally have an oxygen barrier layer, such as poly(ethylene-co-vinyl alcohol) (“EVOH”), contiguously disposed radially outward from the PEX layer. The pipe is suitable for potable water applications and for hot water radiant heating systems.
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Backman Arthur L.
Dalal Girish T.
Mahabir Carl M.
Hook James
Noveon IP Holdings Corp.
Powell Joe A.
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