Priorlight

Paste a patent claim or an invention disclosure and Priorlight searches patent offices and scientific literature for the closest prior art. Results are arranged as a claim chart: each element of the claim beside the passages that disclose it, with gaps clearly shown.

Patent attorneys, in-house IP teams and inventors preparing a filing use it to make the first search faster and more structured. It covers the major patent offices and over 100 million papers. It is a search aid; it does not offer legal opinions on novelty or validity, and translations of non-English patents are machine-made, so key passages should be checked against the original.