Internal Curing SAP Patents: Leaders, Trends & White Space 2026
Internal Curing with Superabsorbent Polymers: Patents Shaping Autogenous Shrinkage Control
Concentrated top tier. The five most active filers together hold 43.3% of all 90 records in scope, and the top ten hold 63.3% — a field where a handful of assignees set the claim boundaries. Filings rose from 4 in 2017 to a peak of 14 in 2020, then fell back to 6 by 2021. The complete-year comparison from 2021 (6) to 2024 (3) shows a -50% pull-back — a real signal, though 2025 and 2026 figures are still incomplete due to publication lag and should not be read as a continuation of that decline.
- 1CEMEX RES GRP AG13
- 2CEMEX INNOVATION HLDG LTD9
- 3DOW GLOBAL TECHNOLOGIES LLC6
- 4PURDUE RES FOUND6
- 5SUVERSOL INT LLC5
See the full internal curing with superabsorbent polymers 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 internal curing SAP patents
What is internal curing with superabsorbent polymers in concrete?
Internal curing uses materials such as superabsorbent polymers (SAPs) or prewetted lightweight aggregate mixed into concrete to hold water internally and release it gradually as the cement hydrates. This offsets autogenous shrinkage, which occurs when a mix self-desiccates during hydration and cracks before it can be cured from the surface. Patents in this space typically claim the SAP or aggregate formulation, the water release kinetics, or the resulting reduction in cracking or void structure, rather than the base concrete mix itself.
Who holds the most patents in internal curing agents for concrete?
The assignee ranking behind this dataset covers 36 companies and research institutions, with the leading assignee credited with 13 of the 90 records in scope. The field is concentrated at the top: the five most active filers together account for 43.3% of all records, and the top ten account for 63.3%. Beyond that, filing activity spreads thinly across a long tail of universities and single-filing entrants.
Is the internal curing patent field still growing?
Filing activity rose from 4 records in 2017 to a peak of 14 in 2020, then declined; the most reliable complete-year comparison, 2021 (6) to 2024 (3), shows a -50% drop. Because publication lags filing by roughly 18 months, the 2025-2026 figures in any dataset will look artificially low and should not yet be read as confirming a continued decline. The honest read is that the core claim space cooled after 2020, with the trajectory since 2024 still unresolved.
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 Internal Curing with Superabsorbent Polymers 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.