Polypore Rejected by Supreme Court on Microporous Sale

The U.S. Supreme Court left intact a Federal Trade Commission order requiring Polypore International Inc., a maker of battery components, to sell the Microporous unit the company acquired in 2008.

The justices today turned away an appeal filed by Charlotte, North Carolina-based Polypore, leaving in place a lower-court ruling backing the FTC. The consumer-protection agency said the acquisition would reduce competition in the market for battery separators, the microporous membranes that prevent short circuits in lead-acid batteries.

Microporous accounted for 10 percent of Polypore’s 2012 sales, the company said in a regulatory filing in May. Polypore said in that filing that the dispute “will not have a material adverse impact on its business or financial condition.”

The case is Polypore v. Federal Trade Commission, 12-1016.

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