Appeal No. 2001-2434
Application No. 08/761,467
amphoteric or zwitterionic surfactants or a combination thereof
in a hard surface cleaner.
Wolf teaches that “[s]urface-active alkyl glycosides, which
are mainly used for detergents and cleaners, have been known for
a long time” (col. 1, lines 7-9), and discloses alkyl glycosides
which are useful as surfactants in detergents and cleaners
(col. 2, lines 19-21). The alkyl glycosides have the formula
RO(G)m, where G is a saccharide unit, preferably glucose, R is an
aliphatic radical with 1 to 30 carbons, and m is 1 to 12 (col. 1,
lines 62-64, col. 2, lines 10-11 and 65-68). “The value of m
should be as small as possible because the alkyl polyglycosides
which are produced in minor amounts in the reaction have less
detergent power than the alkyl monoglycosides. The value of m is
therefore preferably from 1.1 to 1.5" (col. 3, lines 1-5). The
alcohols disclosed as being suitable for forming the alkyl
glycosides by reaction with monosaccharides or compounds which
form monosaccharides under the reaction conditions include
oxoalcohols, one of the exemplified oxoalcohols being Dobanol® 91
(col. 2, line 59), which is the appellants’ preferred oxoalcohol
(specification, page 3, line 26 - page 4, line 2). The
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