Skating the Thin Ice of the Written Description Requirement

In Rochester, a sharply divided Federal Circuit declined to rehear the district court's decision that invalidated a patent previously held by the University for failing to meet the separate written description requirement. Judge Alan David Lourie, in his concurring opinion, wrote that 'there is and always has been a separate written description requirement in the patent law.' Id. at 1305. Both Judges Richard Linn and Rader disagreed. First, '[r]eading into paragraph 1 of section 112 an independent written description requirement, divorced from enablement, sets up an inevitable clash between the claims and the written description as the focus of the scope of coverage. This is ill-advised.' Id. at 1307. Second, the Federal Circuit's issuance, withdrawal and re-issuance of the decision in the Enzo case indicated that a controversy existed over whether the written description requirement, as a separate and distinct requirement, is indeed valid. In Enzo, the Federal Circuit initially held that 'a deposit is not a substitute for a written description of the claimed invention.' Id. at 1308 (citation omitted). In so holding, the Federal Circuit applied the recently adopted requirement from Eli Lilly that a biotechnological invention must include a nucleotide-by-nucleotide recitation of its structure. Accordingly, the Enzo court invalidated the claims to a polypeptide detector, even though the patent described the polypeptides and three samples of the specifically claimed material were deposited at the American Type Culture Collection. Rochester, 375 F.3d at 1308. The Federal Circuit hastened to withdraw the initial Enzo decision following a firestorm of controversy and reversed the result. Id.