Feeney persisted in his errors, and in 1953 he was excommunicated by Pope Pius XII ferendae sententiae for grave disobedience, as he obstinately refused to obey the order to appear at the Vatican to explain his doctrine, even under pain of excommunication. (The false pope Paul VI eventually rescinded the excommunication, at least putatively.)
I enjoy the insanity of contradiction when the sspx or sedes point out Fr Feeney's "excommunication", being that all of the bishops of both these groups are excommunicated as well. The 2nd contradiction is that most sedes don't even consider Pius XII to have been a valid pope. The 3rd contradiction is that Paul VI rescinded the excommunication, which the sspx should accept, but they don't.
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Contradictions all around. But the worst one is Sean, a rabid anti-sede, using Sede sources for this topic. Ahh, isn't summertime great for cherry-picking?