What constitutes “substantial activity” in the U.S. for the on-sale bar under pre-AIA law?

The concept of “substantial activity” in the U.S. is crucial for determining if foreign sales can trigger the on-sale bar under pre-AIA law. While the MPEP doesn’t provide an exhaustive definition, it offers guidance: “‘On sale’ status can be found if substantial activity prefatory to a ‘sale’ occurs in the United States.” (MPEP 2133.03(d)) This…

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How does reduction to practice relate to the on-sale bar in patent law?

Reduction to practice and the on-sale bar are closely related concepts in patent law, particularly in determining the critical date for patentability. The MPEP 2138.05 does not directly address this relationship, but it’s important to understand their interaction: The on-sale bar, codified in 35 U.S.C. 102(a)(1), prevents patenting an invention that was on sale more…

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Does a sale need to be public to trigger the on-sale bar?

No, a sale does not need to be public to trigger the on-sale bar under 35 U.S.C. 102(b). The MPEP clarifies this point: Unlike questions of public use, there is no requirement that “on sale” activity be “public.” “Public” as used in pre-AIA 35 U.S.C. 102(b) modifies “use” only. “Public” does not modify “sale.” (MPEP…

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