This opinion from the United States Court of Appeals for the Federal Circuit, dated October 15, 2025, concerns the patent infringement case of Brita LP v. International Trade Commission (ITC). The court is reviewing Brita's appeal of an ITC decision that found certain claims of Brita's U.S. Patent No. 8,167,141 invalid. Specifically, the patent relates to gravity flow filter media designed to remove contaminants, defined by a metric called the Filter Rate and Performance (FRAP) factor. The Federal Circuit ultimately affirms the ITC's decision, ruling that the patent claims are invalid for lack of written description and lack of enablement because the patent only adequately described carbon-block filters and failed to show possession or teach how to make non-carbon-block filters capable of achieving the required FRAP factor.

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