Appeal No. 95-3140
Application No. 08/058,453
difference magnitude to strength related values for the
concrete being tested (page 14, line 17 to page 15, line 11,
and page 16, lines 19-25). Lastly, a strength related value
for the concrete being tested using the difference magnitude
and the analysis information is determined (page 15, lines 4-
18 and page 16, lines 19-25).
THE PRIOR ART
The Rzepecka reference discloses that microwaves can be
used to test the strength of concrete having known factors or
parameters, such as type of mixture and moisture content.
According to the reference, the same parameters affect the
strength of concrete and its dielectric constant or
permittivity. These parameters include the water to cement
ratio of the cement. In Fig. 2(b), Rzepecka illustrates
apparatus for measuring the reflection coefficient of a
concrete surface and the actual strength of a concrete sample
during its curing process. That apparatus includes an
oscillator corresponding to appellants' oscillator 24 (Fig.
1), a directional coupler for coupling to a concrete sample
corresponding to appellants' directional
6
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