Appeal No. 1997-4235
Application No. 08/464,426
The subject matter on appeal relates to a radome including
a patterned copper film functioning as a frequency selective
surface. Further details of this appealed subject matter are
recited in illustrative claim 21 reproduced below:
21. A radome including a patterned copper film
functioning as a frequency selective surface, the film
having complex curvature, a nominal thickness of about
0.1 mil, and fine-line circuit elements with
controlled undercut etched in the area of complex
curvature to line widths ranging from about 3 - 10
± 0.25 mils, and at least one dielectric sheet to
support the film.
In addition to what is perceived by the examiner to be the
admitted prior art, the examiner relies on the following prior
art references as evidence of unpatentability:
Burton et al. 3,907,565 Sep. 23, 1975
(Burton)
Purinton 3,961,333 Jun. 01, 1976
Traut 4,659,598 Apr. 21, 1987
L. Missel and F.D. Murphy (Missel), “Steady State Etching of
Copper,” Metal Finishing, Dec. 1969, 47-52, 58.
Claims 21 through 26 and 29 on appeal stand rejected under
35 U.S.C. § 103(a) as unpatentable over Burton, Purinton, and
“the appellant’s disclosure of the prior art,” in view of
Missel. (Answer, pages 4-7.) Further, claims 27 and 28 on
appeal stand rejected under 35 U.S.C. § 103(a) as unpatentable
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