  An ultra-low Q value $\beta$-decay can occur from a parent nuclide to an
excited state in the daughter with $Q_{UL}$ <1 keV. These decays are of
interest for nuclear $\beta$-decay theory and as potential candidates in
neutrino mass determination experiments. To date, only one ultra-low Q value
$\beta$-decay has been observed -- that of $^{115}$In with $Q_\beta$ = 147(10)
eV. A number of other potential candidates exist, but improved mass
measurements are necessary to determine if the decays are energetically allowed
and, in fact, ultra-low. We performed precise $\beta$-decay Q value
measurements of $^{112,113}$Ag and $^{115}$Cd and combined them with nuclear
energy level data for the daughter isotopes to determine if the potential UL Q
value $\beta$-decay branches of $^{112,113}$Ag and $^{115}$Cd are energetically
allowed and <1 keV. The Canadian Penning Trap at ANL was used to measure the
cyclotron frequency ratios of singly-charged $^{112,113}$Ag and $^{115}$Cd ions
with respect to their daughters. From these measurements, the ground-state
$\beta$-decay Q values were obtained. The $^{112}$Ag, $^{113}$Ag, and
$^{115}$Cd $\beta$-decay Q values were measured to be 3990.16(22) keV,
2085.7(4.6) keV, and 1451.36(34) keV, respectively. These results were compared
to energies of excited states in $^{112}$Cd at 3997.75(14) keV, $^{113}$Cd at
2015.6(2.5) and 2080(10) keV, and $^{115}$In at 1448.787(9) keV, resulting in
$Q_{\textrm{UL}}$ values of --7.59(26) keV, 6(11) keV, and 2.57(34) keV,
respectively. The potential UL Q value decays of $^{112}$Ag and $^{115}$Cd have
been ruled out. $^{113}$Ag is still a possible candidate until a more precise
measurement of the 2080(10) keV, 1/2$^{+}$ state of $^{113}$Cd is available. In
the course of this work we have found the ground state mass of $^{113}$Ag
reported in the 2020AME to be lower than our measurement by 69(17) keV (a
4$\sigma$ discrepancy).
