Appeal No. 95-4298
Application No. 07/886,263
This appeal was taken from the examiner's decision
rejecting claims 1, 3 through 9 and 11 through 20, which are
all of the claims remaining in the application.
Claim 1, which is illustrative of the subject matter on
appeal, reads as follows:
1. An analytical element useful for the determination of
prostatic acid phosphatase in an aqueous specimen comprising:
a porous spreading zone containing
(a) a nonhygroscopic aromatic phosphate which
reacts as a substrate with prostatic acid phosphatase to
produce a phenol reaction product, said nonhygroscopic
aromatic phosphate substrate being an alkaline earth salt of
an aryl phosphate ester, and
(b) a diazonium or tetrazolium salt which is
capable of reacting with said phenol reaction product to
provide a chromophore,
said element further comprising a buffer which maintains
said element at a pH of from about 3 to about 6.5 when
contacted with an aqueous specimen.
The references relied on by the examiner are:
Schnabel et al. (Schnabel) 4,758,508 Jul. 19, 1988
Katsuyama 63-88000 Apr. 19, 1988
(Japanese Kokai patent application)
Marie Pernicova, "Proof of Prostatic Acid Phosphtase Activity
in Gel Carriers," Scripta Medica 259-64 (1971)
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