This dataset identifies 364 patent families published between 2015 and mid-2026 that combine core validation terminology — limit of detection, method validation, analytical sensitivity — with supporting quantitative language such as calibration curve, signal-to-noise ratio and recovery, within material-analysis IPC classes. That figure counts families rather than raw document publications, which is the fairer unit because it neutralises duplicate filings across jurisdictions and continuation applications. It should be read as a scoped search result, not an exhaustive count of every patent touching these concepts.

Filing peaked at 43 families in 2021, held near that level in 2022 at 36, and has declined toward 16 in the most recent tracked year. Because publication lags filing by roughly 18 months, the most recent year always looks artificially low, so the true 2025-2026 volume is probably higher than currently visible. Even accounting for that lag, the multi-year trend from 2021 onward points to a plateau rather than continued growth.

India leads as a receiving office with 103 filings, followed by China at 93 and the United States at 73; WIPO’s PCT route accounts for 29, the European Patent Office 26, and Canada 13. This distribution means a review of only US and European filings would miss the majority of documented activity. Anyone assessing freedom to operate or competitive positioning in this space should check Indian and Chinese filings directly rather than relying on US-centric databases alone.