Appeal No. 1996-2766
Application No. 08/258,909
According to appellants, the invention is directed to
compositions and dosage forms for cleaning protein and lipid
deposits from the lens surface of contact lens by providing a
cleaning composition which increases the pH to a basic level
using substantially no protein-digesting enzyme or protein-
dissolving surfactant (Brief, pages 2-3). Claim 15 is
illustrative of the subject matter on appeal and a copy of
this claim is reproduced below:
15. A solid pH-controlled cleaner dosage form, comprising:
a) a tonicity builder comprising a water-soluble salt
compatible with ocular tissue; and
b) a pH regulator selected from the group consisting of
basic acetates, phosphates, borates, nitrates, sulfates,
tartrates, lactates, carbonates, bicarbonates, and mixtures
thereof, whereby dissolution of said pH regulator in an
aqueous environment results in a protein cleaning composition
having a pH of 7.5 to 11.5,
wherein said composition includes substantially no
protein-digesting enzyme and wherein a protein-dissolving
effective amount of surfactant is absent from said
composition.
The examiner has relied upon the following references as
evidence of obviousness:
Fu 4,323,467 Apr. 6, 1982
Davies et al. (Davies) 4,863,627 Sep. 5, 1989
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