BUFFINGTON, Circuit Judge.
Subsequent to the filing of the opinion in this case, reported in 292 F. 571, the Acheson Oildag Company presented a petition to this court for leave to intervene. It also prayed for a rehearing, on the ground that the patent of Abbott here in controversy was void, because its combination of a colloid, a penetrant, and a lubricant was anticipated by Acheson's patents, No. 966,636, of August 9, 1910, for a lubricant, and No. 1,030,372, of...
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