Appeal No. 1999-2241
Application No. 08/714,914
according to claim 30, wherein the primary container
body and any end cap or caps present in the free-
fluoride-ion-sensitive electrode are constituted of
polytetrafluoroethylene and the first and second
elastomeric gaskets are constructed of a copolymer of
tetrafluoroethylene and perfluoro(methylvinylether).
40. A free-fluoride-ion-sensitive electrode
according to claim 21, wherein the primary container
body and any end cap or caps present in the free-
fluoride-ion-sensitive electrode have a modulus of
elasticity in flexure from 1.0 x 10 to 5.0 x 10 kg/m7 7 2
and the first and second elastomeric gaskets are
constructed of a fluorocarbon elastomer.
The examiner relies on the following prior art references as
evidence of unpatentability:
Frant 3,431,182 Mar. 4, 1969
Bukamier 4,128,468 Dec. 5, 1978
Claims 33 through 40 on appeal stand rejected under 35
U.S.C. § 112, second paragraph, as being indefinite. (Examiner's
answer, page 4.) Further, claims 21 and 40 on appeal stand
rejected under 35 U.S.C. § 103(a) as unpatentable over the
combined teachings of Frant and Bukamier. (Id. at page 3.)
We reverse the examiner's rejection under the second
paragraph of 35 U.S.C. § 112 but affirm the rejection under 35
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