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Compound errors: Written description, not typographical error analysis, controls priority claim

By Taylor MacDonald on July 1, 2026

The US Court of Appeals for the Federal Circuit affirmed summary judgment that the asserted patent was invalid as anticipated because the provisional application to which it claimed priority did not provide adequate written description support for the claimed compound. The Court explained that the proper inquiry was whether the provisional demonstrated possession of the […]

  • Posted in:
    Intellectual Property
  • Blog:
    IP Update
  • Organization:
    McDermott Will & Emery
  • Article: View Original Source

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