  he BCS-like pairing in ultracold fermionic atomic ($UCFAG$) gases is studied
in the model of "isotopic-spin" pairing proposed in 1991 \cite% {Ku-Hof-SSC}.
This model assumes a mismatch ($\delta $) in chemical potentials of pairing
fermionic atoms. It is shown that a $\pi $-Josephson junction can be realized
in $UCFAG$ systems, where the left and right banks $% S$ are the $UCFAG$
superfluids. The weak link $M$ consists from the normal $% UCFAG$ with the
finite mismatch $\delta $. If the $\pi $-junction is a part of a closed ring
the superfluid mass-current flows spontaneously in the ring, i.e., the
time-reversal symmetry is broken spontaneously. This is realized if the radius
of the ring $R$ is larger than the critical one $% R_{c} $. All these effects
exist also in the case when $\delta \gg \Delta $, where $\Delta $ is the
superfluid gap, but with the reduced thickness of the weak link. It is also
discussed, that if junctions $SM_{1}M_{2}S$ and trilayers $% M_{1}SM_{2}$ from
$UCFAG$ are realizable this renders a possibility for a novel electronics -
\textit{hypertronics}.
