Tag Archives: On-Sale Bar

Policy Considerations: The On-Sale Bar for Secret Processes

August 15, 2024PatentAIA, Federal Circuit, First-to-File, International Harmonization, Metallizing Engineering, On-Sale Bar, paid, Patent Invalidity, patent litigation, patent policy, Patent Term, prior art, Prior User Rights, public disclosure, Secret Prior Art, Trade SecretsDennis Crouch

by Dennis Crouch

In light of the Federal Circuit's recent decision in Celanese v. ITC, it's worth examining the policy implications of maintaining a strong on-sale bar that extends even to invalidate patents on secret processes when the resulting products have been commercialized. This rule is rooted in pre-AIA jurisprudence and is now affirmed under the AIA.

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No Sugar-Coating: Post-AIA Patent on Secret Process Barred by Pre-Filing Sale of Product

August 12, 2024PatentAIA, Artificial Sweeteners, Federal Circuit, Helsinn, International Trade, ITC, On-Sale Bar, paid, Patent Filing Strategy, Patent Harmonization, patent litigation, patent validity, prior art, Secret Processes, Statutory Interpretation, Supreme CourtDennis Crouch

by Dennis Crouch

Although the result could have been guessed, the Federal Circuit has issued an important decision interpreting the scope of post-AIA 35 U.S.C. 102 -- and the meaning of the "claimed invention." Celanese Intl. Corp. v. Intl. Trade Comm'n, 22-01827 (Fed. Cir. August 12, 2024). In particular, the court affirmed the precedent of D.L. Auld -- i.e., the on-sale bar continues to block patenting of an otherwise secret process when the patentee makes pre-filing sales of product made using that process. The ITC had invalidated Celanese' artificial sweetener manufacturing process patent based upon these pre-filing sales. That judgment was thus affirmed on appeal.

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