Prior art

As a technical patent analyst, I have examined US Patent 10947555B2 to identify the most relevant prior art. The legal standard for anticipation under 35 U.S.C. § 102 requires that a single prior art reference discloses every element of a claimed invention, either explicitly or inherently.

Based on the patent document itself, US 10947555B2 cites numerous prior art references in its prosecution history. However, without access to the full prosecution history or a detailed claim construction from the PTAB proceedings, it is not possible to definitively state which specific claims are potentially anticipated by each reference under 35 U.S.C. § 102. The patent document provides a "Prior art keywords" section listing "herbicide, plant, aad, gene, sequence", and a "Prior art date" of 2004-04-30.

The patent itself discusses several types of prior art that are relevant to its field:

• TfdA-type genes for 2,4-D resistance: The patent acknowledges the existence of tfdA-type genes that encode proteins capable of degrading 2,4-D. These genes have been identified from the environment and deposited into the Genbank database, with many homologues having similar enzymatic properties to tfdA (>85% amino acid identity). It also mentions that tfdA has been used in transgenic plants to impart 2,4-D resistance in dicot plants like cotton and tobacco, citing Streber et al. (1989), Lyon et al. (1989), Lyon (1993), and U.S. Pat. No. 5,608,147. The invention distinguishes itself by providing an enzyme (AAD-1) capable of degrading both 2,4-D and AOPP herbicides, a property not previously reported for $\alpha$-ketoglutarate-dependent dioxygenases.
• RdpA from Sphingobium herbicidovorans: The patent identifies rdpA (accession #AF516752) from Sphingobium herbicidovorans as a homologue with low amino acid identity (28%) to tfdA. This enzyme was known to catalyze the first step in (R)-dichlorprop and 2,4-D mineralization. The patent states that RdpA had never been expressed in plants, and there was no motivation to do so due to the prevalence of glyphosate-tolerant crops. The current invention specifically uses a modified rdpA gene, referred to as AAD-1, and its variants (e.g., AAD-1 (v1), AAD-1 (v2), AAD-1 (v3)), and describes its unexpected ability to also degrade AOPP herbicides.
• Glyphosate-tolerant crops (GTCs): The patent extensively discusses the widespread use of glyphosate and GTCs (e.g., corn, soybeans, canola, cotton, sugar beets, wheat, rice). It highlights that the repeated use of glyphosate has led to weed shifts and the selection of glyphosate-resistant biotypes. The invention proposes stacking AAD-1 with glyphosate tolerance traits as a strategy for herbicide resistance management.

While the patent explicitly mentions these areas of prior art, without the detailed content of the cited references and a claim-by-claim analysis, it is not feasible to state precisely which claims of US10947555B2 are potentially anticipated by each specific prior art document under 35 U.S.C. § 102. The PTAB challenges, particularly IPR2024-00179 and IPR2023-01036, are currently scrutinizing claims 1-34 based on prior art, which would involve a detailed anticipation analysis.