Appeal No. 97-1417
Application No. 08/273,040
(a) an exterior wall, said wall including:
(i) a central region of porous material
comprising a ceramic material impregnated with an inorganic
resin and having a pair of opposing exterior surfaces; and
(ii) a skin overlying each of said opposing surfaces
to form a composite structure, said skin comprising a first
cloth of ceramic material impregnated with an inorganic resin
which, under pyrolysis, provides an elemental carbon-free
material and, with increased temperature, gradually converts
from the liquid state to a resilient state and then to a solid
state by about 1200°F.
The references relied upon by the examiner are:
Boyd et al. (Boyd) 5,134,421 Jul. 28,
1992
Liimatta et al. (Liimatta) 5,198,152 Mar. 30,
1993
The sole issue on appeal is whether the examiner properly
rejected claims 1-19 and 21 under 35 U.S.C. § 103 as being
unpatentable over the combination of Boyd and Liimatta.
Discussion
Claim 1 is directed to a radome comprising an exterior
wall including:
(1) a central region of porous material comprising a
ceramic material impregnated with an inorganic resin and
having a pair of opposing exterior surfaces; and
2
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