Appeal No. 93-1311
Application 07/279,713
The subject matter on appeal relates to an article
comprising a substrate having thereon a chromium oxide densified
insulative ceramic coating comprising refractory oxide bubbles
with a melting point above that of glass bubbles as well as to a
method for the production of such an article. Further details3
of this appealed subject matter are set forth in representative
independent claim 1, which reads as follows:
1. An article comprising a substrate and a chromium oxide
densified insulative ceramic coating upon the surface of the
substrate, the coating comprising:
refractory oxide bubbles with a melting point above that of
glass bubbles, a refractory oxide and a water insoluble oxide
effecting a bond between the refractory oxide and said substrate.
The only rejection now before us on this appeal is under
35 U.S.C. § 103, and the following references are relied upon by
the examiner in support of this rejection:
Jones et al. (Jones) 4,615,913 Oct. 7, 1986
Beck 4,744,831 May 17, 1988
All of the appealed claims stand rejected under 35 U.S.C.
§ 103 as being unpatentable over Jones in view of Beck.
Consistent with the appellant’s specification disclosure, we3
interpret the appellant’s claim language “refractory oxide bubbles with a
melting point above that of glass bubbles” as referring to discrete bubbles
(such as hollow beads or spheres) of refractory oxide material (e.g., see the
first full paragraph on specification page 2) as opposed to pockets of air
trapped in the coatings of the prior art (e.g., see the last full paragraph on
specification page 1).
2
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