Appeal 2007-1112
Application 10/692,116
8. Claim 3, below and which depends from claim 2, also below, is
representative of claims 3-5 and 10-13 rejected over the
combination of Haldenby, Seal, and Luttmann.
2. The gas cylinder of Claim 1, wherein said plastic coating
is heat bonded to said inner side.
3. The gas cylinder of Claim 2, wherein said plastic coating
is a polyethylene copolymer.
9. Haldenby teaches metal, and particularly steel, cylinders for
containing gases and liquids wherein a uniform, relatively thick
layer of a polymeric material is applied to the interior surface of
the cylinders such that none of the gas or liquid comes into contact
with the metal. (Haldenby at 5-15 and 49-61).
10. Preferred coating materials are said to be polyolefins such as
polyethylene. (Haldenby at 2:41-46).
11. Haldenby further notes that “[i]t is known to coat the interior of
metal cylinders with a plastic coating to prevent attack by reactive
gases.” (Haldenby at 22-25).
12. In discussing the background of its invention, Seal states that
“there are basically two primary technologies” used for
“lightweight, high-pressure gas containment” one of which is
“graphite/epoxy composite with a yielding aluminum liner.” (Seal
at 1:39-41).
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