In re: Efthymiopoulos

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The 141 application relates to methods of treating or preventing influenza by administering the drug zanamivir by oral inhalation. The examiner rejected the pending claims as obvious over Australian Patent No. AU-A1-27242/92 (Von Itzstein I), in view of WIPO Publication WO 91/16320 (Von Itzstein II) and other references. The Patent Trial and Appeal Board agreed, finding that Von Itzstein II’s disclosure of “inhalation” for treating influenza with its compounds “is reasonably understood to disclose inhalation by either the nose alone, mouth alone, or both” and concluded that Von Itzstein II ,in view of Von Itzstein I’s disclosure of zanamivir, rendered the claims obvious. The Board also considered the applicant’s evidence of secondary considerations—namely of unexpected results—but found it to be unpersuasive. The Federal Circuit affirmed the rejection as supported by substantial evidence. View "In re: Efthymiopoulos" on Justia Law