Kernrechtsfrage
Whether the appeal against the interim order was admissible under Art. 93 BGG
Extrahierter Entscheid
The appeal was inadmissible because the order caused no irreparable legal disadvantage and did not justify immediate review.
Extrahierte Begründung
A third-party notice claimant must expect a prompt exchange of briefs after admissibility of the claim; the alleged inability to substantiate the claim at that stage and the additional costs were only practical disadvantages, not legal ones.