Appeal No. 1999-2241
Application No. 08/714,914
22. (allowable) A free-fluoride-ion-sensitive
electrode comprising:
(A) a substantially liquid-impermeable solid
fluoride-sensing crystal that is constituted
of one or more fluoride-ion-sensitive solid,
crystalline, substantially water-insoluble
fluorides;
(B) first and second solid elastomeric gaskets
that form a sealing array with the fluoride-
sensing crystal;
(C) a primary container body constituted of
electrically insulating material and having
walls surrounding a central cavity that
extends completely through the primary
container body, thereby forming a first and a
second end of said central cavity, said
central cavity having a size and a shape such
that a sealing array among the primary
container body, the - fluoride-sensing
crystal, and said first and second
elastomeric gaskets is formed;
(D) means for maintaining the sealing array among
the fluoride-sensing crystal, the first and
second elastomeric gaskets, and the primary
container body when they are jointly rotated,
said means not including use of any cement or
adhesive or any incorporation of the
fluoride-sensing crystal into a cohesive
unitary solid from which it can not be
removed intact without dividing all parts of
the unitary solid that do not consist of the
fluoride-sensing crystal into at least two
separate pieces;
(E) means for dividing the central cavity of the
primary container body so as to constitute
jointly with the primary container body, the
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