Dental Monitoring SAS v. Align Technology, Inc. — Provisional Must Support a Published Claim to Supply Prior Art Date

Background

Dental Monitoring’s U.S. Patent No. 10,755,409 concerns acquiring and analyzing images of a patient’s dental arch with a deep-learning device. Align challenged claims 1–15 in inter partes review. Whether one asserted reference, Carrier, qualified as prior art depended on whether it could use the filing date of its provisional application. The PTAB treated the priority requirements as largely ministerial and found the claims obvious.

The Court’s Holding

The Federal Circuit vacated and remanded. Reading AIA Sections 102(d)(2), 119(e), and 112(a) together, the court held that a reference patent may receive its provisional application’s filing date for prior-art purposes only if the provisional provides written-description support for at least one claim in the later published application or patent. It is not enough that the provisional merely describes the particular subject matter on which the challenger relies.

The PTAB had not made the necessary factual finding about claim support, so the Federal Circuit remanded rather than reversing outright. The panel also held that the statutory text controlled over legislative-history statements characterizing the requirements as ministerial.

Key Takeaways

• Under the AIA, a patent reference does not automatically inherit its provisional filing date for prior-art purposes.
• The provisional must satisfy Section 112(a) for at least one claim that appears in the later publication.
• When the PTAB applies the wrong legal test but has not made the required factual findings, remand is the appropriate remedy.

Why It Matters

The decision rejects a broader PTAB approach to provisional-date prior art and gives patent owners a concrete way to test whether an asserted reference truly predates their invention. Challengers relying on a provisional must establish claim-level written-description support, not just a disclosure-level match.