In Re Stepan Company , No. 2016-1811 (Fed. Cir. Aug. 25, 2017)
The Federal Circuit vacated a Patent Trial and Appeal Board’s obviousness decision for failing to adequately articulate its reasoning. The Stepan Company filed an application for herbicidal formulations containing glyphosate salt with a surfactant system, which provides better adherence to leaves and enhances penetration. This invention is based on a combination of surfactants that achieves a high cloud point (above 70°C) to allow for quicker formulation of glyphosate concentrates.
The Examiner cited one reference, Pallas, which taught glyphosate compositions containing surfactants having a cloud point of at least 50ºC. The Examiner found “it is routine optimization to select and adjust the surfactants to this range since Pallas teaches the surfactant component comprises any combination of surfactants.” The Board affirmed the Examiner’s decision and the Stepan Company appealed to the Federal Circuit.
Articulate Reasoning for Obviousness An obviousness determination requires finding both that a skilled artisan would have been motivated to combine the teachings of the prior art and that the skilled artisan would have had a reasonable expectation of success in doing so. Quoting In re Lee, the Board “must make findings of relevant facts, and present its reasoning in sufficient detail that the court may conduct meaningful review of the agency action.” In this case, the Board statement that a skilled artisan “would have arrived at the claimed invention through routine optimization falls short of this standard.” Similar to “intuitive” or “common sense” the Board must provide some rational underpinning explaining why a skilled artisan would have arrived at the claimed invention through routine optimization.
In addition to the lack of factual finding, the Federal Circuit found that the Board failed to provide explanation regarding a reasonable expectation of success to arrive at the claimed features. Citing Pfizer, Inc. v. Apotex Inc. (Fed. Cir. 2007) and Medichem, S.A. v. Rolabo (Fed. Cir. 2006), the Federal Circuit again emphasized that to “have a reasonable expectation of success, one must be motivated to do more than merely to vary all parameters or try each of numerous possible choices until one possibly arrived at a successful result.” The Board failed to do this.
Routine Optimization Not Applicant’s Burden
In vacating the Board’s decision that the claims would have been obvious, the Federal Circuit also found that the Board erroneously rejected relevant evidence of nonobviousness, and improperly shifted the burden of proving patentability to the applicant, Stepan Company. Consistent with In re Kahn, the Board cannot establish a prima facie case of obviousness because it failed to adequately articulate its reasoning. Thus, the burden does not shift to the applicant to show that achieving a cloud point above 70ºC would have been obvious to a person of ordinary skill in the art.
When faced with an obviousness rejection based on routine optimization, applicants may be better served in arguing the lack of an articulated obviousness rationale as opposed to showing a criticality of the claimed feature or trying to argue for a limitation exception to routine optimization.
When arguing nonobviousness, applicants should consider presenting evidence that establish the nexus between the failure of prior art and the lack of claimed elements. This decision provides basis for applicants to argue that disregarding these evidence is a legal error.
Lengthy Appeal Process Continues
The result of this decision is a remand back to the Board for further proceedings. This application was filed in 2009 and after two office actions, a notice of appeal was filed in 2012. The Board acted four year later before the appeal to the Federal Circuit. Until the USPTO takes substantive action to address this backlog, applicants should be cautioned that seeking redress through appeal remains a lengthy procedure.