Appeal No. 1998-1053
Application No. 07/974,832
correction factor.” Claim 3, which depends from claim 2, sets
forth that "the estimating step comprises using the
measurement determinative of density and one of the
measurements determinative of pressure to estimate a parameter
related to the air content of the furnish." Our problem here
is that we do not understand exactly which "the estimating
step" is being referred to in claim 3, i.e, the estimating
step of claim 1 or one of the two estimating steps set forth
in claim 2. In addition, we are at a loss to understand what
is meant by the language in claim 3 regarding "one of the
measurements determinative of pressure," since we see nothing
in claims 1 and 2 that would indicate that more than one
measurement determinative of pressure was made or is required.
Claims 7 and 8, which are dependent from claims 5 and 6,
include the same types of ambiguity found in claim 3.
Claim 17, which depends from claim 1, indicates that "the
density and pressure are measured before and in the headbox,"
while claim 18, which also depends from claim 1, sets forth
that the current velocity is "estimated using only density and
pressure measurements." Our problem here is that it is not
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