Appeal No. 95-1238
Application 08/009,406
b) receiving the portions of said two beams which are
transmitted through the mixture; and
c) determining the concentration of the first at least three
material component based upon the two directed beams and the
transmitted portion of the two beams, and not based upon any
other x-ray beams.
The Examiner relies on the following references:
Arendt 3,904,876 Sept. 9, 1975
Orval Utt et al. (Utt), “Composition Compensated Paper Ash
Gauge,” Industrial Nucleonics Corporation, Columbus, Ohio,
1975, pages 110-114.
Claims 1 through 25 stand rejected under 35 U.S.C. § 103 as
being unpatentable over Arendt and Utt. On pages 3 and 4 of the
answer, the Examiner states that Arendt teaches in column 3,
lines 47-65, a method of measuring the percentages of the ash by
using a first energy higher than the K absorption edge of
titanium oxide, a second energy between the K absorption edges of
titanium oxide and calcium carbonate and a third energy which is
below the K absorption edge of clay. On pages 4 and 5 of the
answer, the Examiner states that Arendt uses the Lambert’s law in
which three separate x-ray energies are used to measure titanium
oxide, calcium carbonate and clay. The Examiner states on page 4
of the answer that Utt reveals in Figure 2 that the absorption
coefficients of titanium oxide and calcium carbonate are about
the same at the energies of 4.1 and 6.2 KeV. The Examiner argues
3
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