Hair Care & Surfactant Patents: Who Leads, Where the Gaps Are 2026
- Filing activity peaked in 2018 at 113 records and has declined since, with the 2022 midpoint at 50 — a category consolidating around known chemistry rather than expanding into new claim space.
- Co-assignee filing is dominated by a single corporate family, with Unilever entities pairing internally on 209, 51 and 50 records respectively — a filing pattern, not a competitive rivalry.
- Momentum has cooled across every major filer in the latest year, including a 90% year-on-year drop for Procter & Gamble and a 100% drop for Conopco — a sign the field is between innovation cycles.
What this landscape covers
This dataset tracks patent families filed against hair care formulation, shampoo composition, and conditioning agent language, cross-referenced against mildness, foam quality, deposition, sulfate-free, and silicone-alternative claim terms under IPC classes A61K8, A61Q5 and C11D1. It spans 2015 through the mid-2026 data cut-off, covering 2,504 published records and an equal number of families in the assignee ranking — a corpus concentrated in cosmetic-use and medicinal-preparation classifications rather than pure detergent chemistry.
Publication lags filing by roughly 18 months, so the 2025 and 2026 figures in any trend line understate real filing activity for those years. Read the recent decline as a floor, not a final verdict.
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Filing trends and technology composition
Filing volume and IPC distribution together show a field that built its core claim positions early and has since slowed its rate of new filing, even as cosmetic-use classifications keep dominating over pure detergent chemistry.
A category past its filing peak
Filings ran from 87 in 2017 to a peak of 113 in 2018, then eased toward 50 at the 2022 midpoint and down to 5 in the most recent (partial) year. That trajectory reads as flat-to-declining rather than an emerging technology still finding its footing.
Cosmetic-use claims dominate over detergent chemistry
A61K (medicinal preparations, 2,313 records) and A61Q (cosmetics use, 2,217) dwarf C11D (detergents & cleaning, 888), meaning most activity frames hair care as a topical cosmetic or dermatological formulation rather than a surfactant-cleaning problem. Smaller pockets in C08L (polymer compositions, 476) and D06M (textile treatment, 86) mark where conditioning-polymer and fiber-adjacent claims sit.
Shares are the percentage of the 2,504 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Hair Care and Surfactant Systems with Eureka
This page is one run against one query. Ask Eureka your own question about hair care and surfactant systems and every answer comes back with the patent numbers behind it.
Try EurekaThe prior art that still anchors this field
US20230088878A1 — Hair Care Formulation (Union Carbide Corporation, 2023-03-23)
A hair care formulation comprising a dermatologically acceptable vehicle, a dermatologically acceptable silicone, and a deposition aid polymer built from a branched-chain cationic dextran functionalized with quaternary ammonium groups, with a weight average molecular weight of 100,000 to 650,000 Daltons, engineered to enhance deposition of silicone onto hair.Filed by Union Carbide Corporation, this record illustrates the deposition-polymer approach that dominates current-generation silicone-alternative claims.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US3962418A | Mild thickened shampoo compositions with conditioning properties | 1,644 |
| 2 | US3964500A | Lusterizing shampoo containing a polysiloxane and a hair-bodying agent | 1,276 |
| 3 | US4364837A | Shampoo compositions comprising saccharides | 1,251 |
| 4 | US20030203829A1 | Multi component controlled delivery system for fabric care products | 470 |
| 5 | US5837661A | Conditioning shampoos containing polyalkylene glycol | 376 |
| 6 | US6649155B1 | Anti-dandruff and conditioning shampoos containing certain cationic polymers | 341 |
| 7 | US5980931A | Cleansing products having a substantially dry substrate | 328 |
| 8 | US5756436A | Conditioning shampoo compositions containing select cationic conditioning polymers | 300 |
| 9 | US5120532A | Hair styling shampoos | 300 |
| 10 | US5968286A | Heat-mediated conditioning from shampoo and conditioner hair care compositions containing silicone | 258 |
Citation counts inside a searched corpus favour older records; treat this list as a map of foundational influence, not of current filing activity.
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Browse MCP servers →What the numbers say about where this field stands
Three patterns stand out once filing trend, technology composition, and citation history are read together: a mature core, a cosmetic-first framing, and prior art from the 1970s and 1980s that still shapes freedom-to-operate today.
Peak filing is behind this category
The 2018 peak of 113 records has given way to a steady decline, with only 5 records in the most recent partial year. Even allowing for the 18-month publication lag, the multi-year slide from the 2022 midpoint of 50 points to a category settling into its established chemistry rather than expanding.
Cosmetic framing outweighs detergent framing
Records classified under medicinal preparations (A61K) and cosmetics use (A61Q) far outnumber those under detergents and cleaning compositions (C11D). That skew signals that most applicants are claiming hair benefit and skin mildness rather than cleaning performance alone.
Foundational shampoo chemistry still anchors the field
The most-cited record in this corpus, a mild thickened shampoo composition, carries 1,644 citations — far ahead of any other single filing. Newer entrants working on mildness or conditioning claims are almost certainly citing back to this and a small cluster of similarly aged patents.
Co-filing concentrates inside one corporate family
The strongest co-assignee pairing links two Unilever entities on 209 shared records, with two further Unilever-linked pairs at 51 and 50. This is internal corporate-structure filing rather than cross-company collaboration, and it should not be read as an alliance signal.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to hair care and surfactant systems, with the prior art for and against each one.
Who is filing, and who has slowed down
Momentum data shows a field where the largest historical filers — Procter & Gamble, Unilever's various entities, and Conopco — have all cut back sharply in the latest year, opening room for newer or smaller filers willing to move into under-claimed conditioning and deposition chemistry.
Even the most active filer has pulled back
Procter & Gamble recorded just 1 filing in the latest year against its prior-year pace, a 90% year-on-year drop. That is consistent with the broader trend-line decline rather than a company-specific retreat.
Conopco's filing has stopped entirely
Conopco Inc shows zero filings in the latest year, a full year-on-year drop from its prior activity. Combined with flat output from the Unilever-linked entities, the historically largest filing cluster has gone quiet at once.
Filing collaboration is corporate-internal, not cross-company
All ten identified co-assignee pairs in this dataset link entities inside the same corporate groups rather than independent companies filing jointly. That limits what co-filing data can tell a competitive-intelligence team about industry alliances here.
| Assignee | Recent year | YoY |
|---|---|---|
| Procter & Gamble | 1 | -90% |
| Unilever N.V. | 0 | — |
| Unilever PLC | 0 | — |
| CONOPCO INC | 0 | -100% |
| Hindustan Unilever Limited | 0 | — |
| Helen of Troy / Helene Curtis | 0 | — |
| Colgate-Palmolive Company | 0 | — |
| L'Oreal | 0 | — |
Where to take this analysis
The trend and citation data point to specific next steps depending on whether the goal is freedom-to-operate, whitespace filing, or competitive tracking.
Check freedom-to-operate against the 1970s-80s core patents
The most-cited records in this corpus date to the 1970s and 1980s and still anchor mildness and conditioning claims. Any new filing on foam quality or deposition should be checked against this cluster before drafting claims.
Explore prior art in Eureka →Map the deposition-polymer branch in more depth
Branched cationic dextran and similar deposition-aid polymers, as seen in the representative 2023 filing, sit in a comparatively active sub-branch even as overall filing slows. This is worth a dedicated sub-search before committing R&D resources.
Run a focused search in Eureka →Track Unilever's internal filing structure separately from its competitive activity
Because the strongest co-assignee pairs are all Unilever-linked entities, competitive tracking should separate internal corporate restructuring from genuine shifts in R&D direction.
Set up assignee alerts in Eureka →Common questions about hair care and surfactant patents
No — filing activity peaked in 2018 at 113 records and has declined steadily since, reaching 50 at the 2022 midpoint and only 5 in the most recent partial year. Because publication lags filing by roughly 18 months, the very latest years will always look thinner than they eventually turn out to be, but the multi-year trend is a genuine slowdown rather than a data artifact. Anyone evaluating this space should treat it as a mature, consolidating category rather than an emerging one.
The dataset's largest historical filers cluster around Procter & Gamble and several Unilever-linked entities, including Conopco and Hindustan Unilever. However, momentum data shows all of them slowing sharply in the latest year — Procter & Gamble down 90% year-on-year and Conopco down to zero — so current filing leadership is less concentrated than historical volume alone would suggest. Co-assignee data also shows the strongest filing pairs are internal to the Unilever corporate group rather than cross-company partnerships.
Records classified under A61K (medicinal preparations) and A61Q (cosmetics use) heavily outnumber those under C11D (detergents and cleaning compositions) — 2,313 and 2,217 versus 888. That means most applicants frame their claims around cosmetic or dermatological benefit — mildness, conditioning, hair feel — rather than pure cleaning or surfactant performance. A filing strategy built purely around detergent-class claims would be competing in a smaller, though less crowded, part of the classification space.
Start with the most-cited records in this corpus, several of which date to the 1970s and 1980s and still carry over a thousand citations each — these define the foundational mild-shampoo and conditioning-agent chemistry that later filings build on. Then look at more recent representative filings, such as the 2023 Union Carbide filing on branched cationic dextran deposition aids, to see how deposition-aid claim language has evolved. Both the old core patents and recent specific formulations need to be checked, since freedom-to-operate risk can come from either layer.
The strongest under-claimed pockets sit adjacent to the dense core: branched cationic polysaccharide deposition aids, silicone-free conditioning via bio-polymer substitutes, sulfate-free foam-quality boosters, and crossover into textile-fiber treatment classifications like D06M, which has only 86 records in this corpus. These branches show comparatively thin coverage relative to the crowded core shampoo-composition and conditioning-agent claims, making them reasonable areas to explore before committing to a core reformulation claim that likely sits on dense prior art.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.