Polyacrylamide Flocculant Manufacturing Patents
33.9% of all 6,569 records sit with just five assignees, so most of the field's claim space is already staked before a newcomer opens a search. Filings peaked in 2017 at 432 records. Using only complete years, 2021 filings (192) fell to 132 by 2024, a 31% decline over that three-year span. That is a genuine cooling in a field that was heavily claimed earlier in the period, not a data artifact.
- 1KEMIRA OY15.6%
- 2PROCTER & GAMBLE CO8.9%
- 3BASF SE3.2%
- 4SOLENIS TECHNOLOGIES CAYMAN LP3.2%
- 5CIBA SPECIALTY CHEM WATER TRATMENTS LTD3.0%
See the full polyacrylamide flocculant manufacturing analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions on this landscape
Who are the leading patent holders in polyacrylamide flocculant manufacturing?
Filing activity is concentrated among a small group of specialty chemical and paper-process companies, with the leading assignee holding 1,027 records against a fifth-place total of 198. The top five assignees combined account for 33.9% of all 6,569 records in scope, and the top ten reach 45.0%. Beyond that group, filings spread across a long tail of companies with far smaller portfolios, so competitive risk is concentrated rather than evenly distributed.
Is the polyacrylamide flocculant patent field growing or shrinking?
Using complete-year data, filings fell from 192 in 2021 to 132 in 2024, a 31% decline over that span, after peaking at 432 filings in 2017. Recent-year figures for 2025 and 2026 look lower still, but that reflects publication lag of roughly 18 months rather than an actual drop in filing activity. The safest read is that the field has cooled meaningfully since its 2017 peak, based on the years that are actually complete.
Which patent classes matter most for polyacrylamide flocculant technology?
D21H, covering pulp and paper compositions, touches 44.8% of the 6,569 records in scope, making it the single largest class by a wide margin. C02F water and wastewater treatment follows at 17.9%, with C11D detergents, C08L and C08F polymer compositions each near 10%. A prior-art or freedom-to-operate search limited only to water-treatment classifications would miss the majority of relevant filings, since flocculant chemistry is claimed heavily through paper-manufacturing applications.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Polyacrylamide Flocculant Manufacturing covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.