PatentNext Takeway: Ex parte Desjardins—and especially the USPTO’s decision to make it precedential—appears to be shifting examination away from § 101 and toward § 112 written-description scrutiny, particularly for AI-related inventions. For AI-related inventions, a central takeaway is that practitioners should expect more examiner demands for concrete disclosure of how an AI model is trained, what inputs and outputs are used, how preprocessing and post-processing occur, and how inference or agentic workflows actually operate. Prosecution data and a recent office action example also suggest that written-description rejections are increasing both overall and in AI applications. The practical implication is that patent applicants should not rely on high-level “black box” AI descriptions, but instead should draft specifications with enough technical detail to demonstrate possession of the claimed invention.
Continue Reading USPTO Examiners issue more Written Description (Section 112) rejections following Precedential Ex Parte Desjardins decision








