Kernrechtsfrage
Whether the claimant was entitled to a permanent disability pension of at least 50% from September 2008 onward.
Extrahierter Entscheid
The claimant did not prove entitlement to an ongoing pension beyond December 2010; the half pension recognized by the cantonal court was sufficient.
Extrahierte Begründung
The Federal Court upheld the cantonal assessment of the psychiatric evidence: full incapacity from September 2007 to March 2008, 50% incapacity until August 2010, and restored full work capacity thereafter. No legally relevant factual error or need for further evidence was shown.