Appeal No. 96-4002
Application No. 08/121,849
ultrasonic liquid gauging system. More particularly,
Appellant indicates at page 5 of the specification that true
and false echoes in an echo profile are discriminated by
determining the relative or actual energy content of the
received echo signals.
Claim 1 is illustrative of the invention and reads as
follows:
1. A method for discriminating true and false echoes in an
ultrasonic liquid gauging system comprising the steps of:
a. transmitting an ultrasonic pulse toward the liquid
surface;
b. detecting true and false echoes after a
transmission; and
c. identifying a true echo from a false echo based on
energy of the echoes by determining which echo has the higher
energy.
The Examiner relies on the following references:
Snyder 4,000,650 Jan. 04,
1977
Baumoel 4,203,324 May 20,
1980
Leszczynski 5,157,639
Oct. 20, 1992
Claims 1-20 stand finally rejected under 35 U.S.C. § 103
as being unpatentable over Leszczynski in view of Snyder and
Baumoel.
2
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