Upper critical field H$_{c2}$ in PrOs$_{4}$Sb$_{12}$

We study the upper critical field of the A and B phases in the triplet superconductor PrOs$_{4}$Sb$_{12}$ within the p+h-wave superconductivity proposed recently for this material. The present result is compared with H$_{c2}$(t) and H*(t), the boundary between the A and B phase in PrOs$_{4}$Sb$_{12}$, reported earlier and with more recent data of H$_{c2}(t)$ for the single phase crystal. We find H$_{c2}$(t)'s for both the two phase crystal and the single phase crystal are described by the model for the A phase. From this fitting one can deduce the Fermi velocity as $v=2.5 \times 10^6$ cm/s. On the other hand H$_{c2}$(t)for the B phase is found to be somewhat smaller than H*(t), which is rather puzzling.