Appeal No. 95-5126
Application No. 08/045,675
reduction in noise level compared to blend 1. See Brief,
pages 15 and 16 in conjunction with Barber, columns 7 and 8.
However, we also note that, by using a small amount of
dimethyl octadecyl phosphonate, blend 3 imparts the same
result as blend 1 even though it uses a less amount of
additives than that required by blend 1 (difference of 0.6 %
by weight of additive package A). See Barber, columns 7 and
8. Moreover, when more additives (additive package A) are
used together with a small amount (0.24 % by weight) of
dimethyl octadecyl phosphonate, the reduction in noise level
is similar to blend 6 containing a succinimide derivative
friction modifier (which corresponds to the claimed 3-
hydrocarbyl-2, 5-diketopyrrolidine) over the whole aural
range, except over 2 kilohertz range. Id. These different
results in the examples comport with the teachings of the
Barber reference, which designate the succinimide derivative
as the main friction reducing means and the alkyl or alkenyl
phosphonate (inclusive of DMOP) as an additional friction
reducing means. See the examples at columns 7 and 8 together
with column 6, lines 15-19. Thus, it is our conclusion that
the Barber and the Papay references as a whole would have led
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