Continuous Crystallization Patents: Leaders & Filing Trends 2026
Continuous Crystallization and PAT Monitoring Patents
- Concentrated at the top. The top 5 assignees hold 60.7% of all 112 records in scope, and the top 10 hold 85.7% – a field where a handful of filers set the terms.
- Pharma and separations overlap heavily. B01D separation processes (26.8% of records) and A61K medicinal preparations (25.9%) are the two largest classes, showing this is as much a drug-substance purification story as a process-engineering one.
- Filing has plateaued, not grown. 2021 and 2024 both sit at 2 filings for the leader cohort tracked, a flat 0% span, after a peak of 23 records in 2022 – recent years are still filling in under publication lag.
Filing growth compares 2021 (2 records) with 2024 (2) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 112 records in scope (CR5), not by the ranked leaders only.
Filing trend and technology composition
A 2022 peak, then a plateau
Filings rose from 2 in 2017 to a peak of 23 in 2022. The leader cohort tracked from 2021 to 2024 shows 2 filings in both years – flat, 0% growth over that span – and the 2025-2026 figures are still incomplete under normal publication lag, so they should not be read as a decline.
Separations and medicinal preparations lead
B01D (separation processes) covers 26.8% of the 112 records and A61K (medicinal preparations) covers 25.9%, followed by B01J (catalysis and physical processes) at 19.6% and C07D (heterocyclic compounds) at 18.8%. C01D (alkali-metal compounds), C25B (electrolytic production), C07C and C13B (sugar refining) each appear in a smaller but still notable slice, reflecting how many different industries route product finishing through a continuous crystallizer. Records can carry more than one class, so these shares add up to more than the record total.
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Summary view of one automated run. Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Continuous Crystallization and PAT Monitoring covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. See the full landscape report