US Federal Circuit narrows prior art from provisional applications
By Nick Robertson ( August 17, 2026, 18:29 GMT | Insight) -- A decision last week from the US Court of Appeals for the Federal Circuit clarifies the standard for identifying priority dates for prior art taken from provisional patent applications, returning law to pre-America Invents Act norms and serving as an important reminder for practitioners attempting to challenge patents at the Patent Trial and Appeal Board.Patent challenges relying on prior art with priority dates from provisional applications will face additional scrutiny before the US Patent Trial and Appeal Board, following an appellate court's ruling last week....
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