arXiv AI By Qiyao Wang, Xinyi Chen, Hongbo Wang, Jiayuan Lu, Jianhang Li, Minghuan Tan, Yuan Lin, Min Yang

Novel or Not? PatEx-Gym: Agentic Prior-Art Search for Novelty Assessment in Patent Examination

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PatEx-Gym is a new framework for developing and evaluating agents that perform patent examination. It includes PatEx-Bench, a benchmark of 1,000 realistic tasks with large retrieval corpora, and PASS, an annotation‑free method for synthesizing search trajectories. A 4B‑parameter PatEx‑Agent trained on these synthetic trajectories provides a lightweight baseline that competes with much larger general‑purpose models, yet prior‑art discovery remains challenging.

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