Key legal question
Whether the appeal against the interlocutory decision on recusal of a court expert was admissible.
Extracted holding
Yes. Decisions on recusal of court experts are separately appealable under Art. 92 BGG.
Extracted reasoning
A recusal decision is a self-standing interlocutory decision; expert recusal falls within Art. 92 BGG. Patent civil actions also lie before a single cantonal instance, so the civil appeal is available regardless of the amount in dispute.