Schlumberger Beats EnerPol’s Fracking Patent Suit on Appeal

Schlumberger Technology Corp. convinced the Federal Circuit to uphold a ruling that it didn’t infringe EnerPol LLC’s patent on hydraulic fracturing methods.

The U.S. Court of Appeals for the Federal Circuit concluded there was “no reversible error” in the district court’s construction of patent claims.

EnerPol agreed to a noninfringement judgment at the district court so that it could appeal the court’s interpretation of the patent language. The Federal Circuit doesn’t defer to a district court’s claims but reviews them from scratch.

EnerPol sued Schlumberger, an oil field services company, in the U.S. District Court for the Eastern District of ...