Appeal No. 95-0565
Application 07/867,089
For a description of the use of reducing acids to produce
glycosides see . . . [EP] 0 077 167[, published] on Apr.
20, 1983.
McDaniel ‘918 also states (McDaniel ‘918, col. 2, l. 3-8):
It is also known that glycosides may be decolorized
by using a bleaching material. Suitable bleaches include
materials such as hydrogen peroxide for bleaching. It
has been observed, however, that upon exposure to high
temperature, a bleached glycoside product can revert to
a darker color product upon standing.
The invention McDaniel ‘918 describes includes neither
the step of contacting the alkyl glycoside with a hydrogen
peroxide bleach nor the step of contacting the alkyl glycoside
with an acid reducing agent. McDaniel ‘918 “discovered that
the catalytic hydrogenation of a glycoside composition can
substantially reduce the color” (McDaniel ‘918, col. 2,
l. 16-18). Moreover, McDaniel ‘918 expressly states (McDaniel
‘918, col. 2, l. 18-24):
The hydrogenation of the glycoside composition of the
present invention allows for considerably greater
stability
after color removal than does bleaching. That is, the
hydrogenation of the color forming bodies in the
glycoside
composition leads to a more stable product than does the
bleaching which gives products capable of reversible
reactions.
As the examiner explains the rejection (Examiner’s Answer
(Ans.), pp. 5-6, bridging para.):
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