No, after expiration of the note the wire does not need to claim funds from the note. Only the user key is required. If we as the manufacturer are perfectly un

No, after expiration of the note the wire does not need to claim funds from the note. Only the user key is required. If we as the manufacturer are perfectly untrustworthy, this is the final "backup" state. If we the manufacturer are partially trustworthy at any point in time, you can re-key the note then. In no case can we claim funds from the note ourselves.