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On October 13, 2010 the CAFC reversed a district court’s judgment that Solvay’s patent claims were invalid due to prior invention. The Solvay patent covered methods of making a chemical. Honeywell made the chemical in the US before the priority date of the Solvay patent, using a process invented by an entity in Russia with which Honeywell had entered into a research contract. It was undisputed that the process invented by the Russian team corresponded to the Solvay patent. Honeywell asserted the Solvay patent was invalid under 35 U.S.C. §102(g)(2) because Honeywell was a prior inventor in the US. The CAFC concluded that Honeywell could not be “another inventor” for purposes of §102(g)(2) because it only reproduced the Russian team’s work and did not conceive of the invention itself.