SERS Patents: Who Leads, Where the Gaps Are 2026
- Concentrated but not locked up. the top 5 assignees hold just 12.7% of the 2,876 records in scope, and the top 10 hold 21.1% — a long tail of single- and few-filing entrants files the rest.
- Filing has cooled from its 2022 peak. activity ran from 146 filings in 2021 to 99 in 2024, a 32% drop over that span, though 2025-2026 counts are still filling in due to publication lag.
- Material analysis dominates the claim space. G01N covers 62.1% of records, while coating and deposition work under C23C sits at just 4.2% — a comparatively open branch given how central substrate fabrication is to SERS performance.
Filing growth compares 2021 (146 records) with 2024 (99) — 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 2,876 records in scope (CR5), not by the ranked leaders only.
What the patent record shows about SERS
Surface-enhanced Raman spectroscopy patents cluster around two persistent engineering problems: making a substrate that reproducibly generates strong hot spots, and making that substrate stable enough to sell. The search set here pairs core SERS and plasmonic-enhancement terms with the practical failure modes that show up in prosecution and prior art — hot spot uniformity, substrate reproducibility, shelf life and quantification difficulty — rather than the phenomenon alone.
That framing pulls in a mix of academic assignees, a handful of corporate labs, and government research bodies, with no single filer commanding a dominant share. The result is a field where claim space is contested at the edges — substrate fabrication, coating chemistry, array geometry — more than at the center.
Filing trends and technology composition
Annual filing counts and IPC subclass distribution across the 2,876 records in scope, drawn directly from the search set defined above.
Filing trend, 2017-2026
Filings rose from 139 in 2017 to a peak of 148 in 2022, then eased to 99 by 2024 — a 32% decline over the 2021-2024 window. Counts for 2025 and 2026 are undercounted because publication typically lags filing by around 18 months; they should not be read as a continued decline.
Technology composition by IPC subclass
G01N (material analysis & testing) touches 62.1% of records, confirming that most SERS patent activity is framed as a measurement or diagnostic method rather than a materials-science claim. B82Y (nanotechnology applications, 15.1%) and G01J (radiation & light measurement, 14.5%) follow at a distance, with A61K (medicinal preparations, 9.5%) marking the biosensing and diagnostics crossover. Because records can carry multiple IPC codes, these shares sum to more than 100% of the record total.
Shares are the percentage of the 2,876 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Surface-Enhanced Raman Spectroscopy with Eureka
This page is one run against one query. Ask Eureka your own question about surface-enhanced raman spectroscopy and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited records in this field
Nanoscale array structures suitable for surface enhanced Raman scattering (US20110128536A1)
Methods for fabricating nanoscale array structures suitable for surface enhanced Raman scattering, structures thus obtained, and methods to characterize the nanoscale array structures suitable for surface enhanced Raman scattering. Nanoscale array structures may comprise nanotrees, nanorecesses and tapered nanopillars.Filed by Lawrence Livermore National Security, LLC — illustrates how substrate geometry claims (nanotrees, tapered nanopillars) are drafted to cover a family of fabrication outcomes rather than a single structure.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6344272B1 | Metal nanoshells | 675 |
| 2 | US5866430A | Raman optrode processes and devices for detection of chemicals and microorganisms | 412 |
| 3 | US20030059820A1 | SERS diagnostic platforms, methods and systems microarrays, biosensors and biochips | 398 |
| 4 | US6174677B1 | Advanced surface-enhanced Raman gene probe systems and methods thereof | 391 |
| 5 | US6149868A | Surface enhanced raman scattering from metal nanoparticle-analyte-noble metal substrate sandwiches | 366 |
| 6 | US20070003603A1 | Antimicrobial silver compositions | 359 |
| 7 | US20050285128A1 | Surface plasmon light emitter structure and method of manufacture | 319 |
| 8 | US5609907A | Self-assembled metal colloid monolayers | 319 |
| 9 | US6197503B1 | Integrated circuit biochip microsystem containing lens | 303 |
| 10 | US6685986B2 | Metal nanoshells | 258 |
Citation counts favor older, foundational filings inside this corpus and should be read as a signal of influence on later filers, not as a measure of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
Put your own technology through the same analysis
Eureka on the web
When you want the answer in the next five minutes.
The agent works the prompt against patents and technical literature, citing every source.
Run your analysis now →MCP server & REST API
When it has to run inside your own pipeline.
Patent search, landscape analysis and assignee resolution as MCP tools. Drop them into any agent framework, or call REST directly.
Browse MCP servers →What the numbers mean for a filing strategy
Three patterns in this dataset matter more than the raw counts: where citations concentrate, how filing has moved since the 2022 peak, and how thin the coating/deposition claim layer is relative to the substrate problem it is meant to solve.
Foundational nanoshell and optrode patents still anchor prior art
The most-cited records — metal nanoshells, Raman optrode detection, SERS diagnostic microarrays — date from the early era of the field and continue to anchor freedom-to-operate searches. New filings in enhancement-factor or trace-detection claims are almost always assessed against this small set first.
Activity has pulled back from its 2022 high without collapsing
Filings ran from 146 in 2021 to 99 in 2024. That is a real pullback from the 2022 peak of 148, but it follows several years of sustained output rather than a single spike — consistent with a field consolidating around known substrate architectures rather than exiting.
Coating and deposition claims lag the substrate problem they address
Shelf life and reproducibility failures in SERS substrates are largely coating and surface-chemistry problems, yet C23C (coating & surface deposition) appears in only 4.2% of the 2,876 records — far behind G01N and B82Y. That gap suggests durable-coating claims are less crowded than the detection-method claims built on top of them.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to surface-enhanced raman spectroscopy, with the prior art for and against each one.
Who is filing, and where the field is still open
No single assignee controls the field: the ranked leader holds 119 records against a total of 2,876, and the top 10 combined reach only 21.1% of all records. Recent-year momentum is thin across the board, with most ranked leaders showing zero or a single filing in the latest year — a sign that this cohort is defending existing positions rather than expanding them.
A university-heavy leaderboard with no dominant corporate filer
The leading assignees are predominantly academic research offices and government labs rather than instrument manufacturers, with corporate filers such as Intel appearing further down the ranking. That mix points to SERS remaining an area where fundamental substrate and detection-method IP originates in research institutions before licensing out.
The drop-off past the top few is gradual, not a cliff
Filing counts fall from 119 at the top to 58 at fifth place and 44 at tenth, a gentle taper rather than a sharp cutoff. This shape usually signals a field where a handful of long-running labs have accumulated modest but steady portfolios alongside many single- or few-filing entrants.
Recent-year filing has gone quiet even among top assignees
Several of the most active historical filers show zero filings in the latest year, including one leader down 100% year-on-year. Given the 18-month publication lag, this understates true recent activity, but it still suggests the established leaders are not currently pushing new SERS filings at their historical pace.
| Assignee | Recent year | YoY |
|---|---|---|
| Duke University | 1 | — |
| Agency for Science, Technology and Research (A*STAR) | 1 | — |
| The Regents of the University of California | 0 | -100% |
| Intel Corporation | 0 | — |
| University of Florida Research Foundation, Inc. | 0 | — |
| Board of Regents, The University of Texas System | 0 | — |
| ImmunoLight, LLC | 0 | — |
| King Fahd University of Petroleum and Minerals | 0 | -100% |
Where to take this analysis
The dataset points to specific next steps depending on whether the goal is freedom-to-operate, licensing, or new filing.
Run a freedom-to-operate check against the most-cited records
Before drafting new enhancement-factor or trace-detection claims, check them against the small set of highly-cited foundational patents that anchor this field's prior art.
Explore in EurekaMap the coating and deposition white space in detail
C23C's comparatively low share of records suggests durable-coating and shelf-life claims are less contested than detection-method claims — worth a closer look before committing a filing strategy.
Explore in EurekaTrack momentum shifts among the ranked leaders
With most top assignees showing flat or falling recent-year filings, watch for new entrants or licensing moves that could reshape the leaderboard over the next few publication cycles.
Explore in EurekaFrequently asked questions
The ranked leader in this dataset holds 119 of the 2,876 records in scope, with the field dominated by university and government research offices rather than instrument manufacturers. The top 5 assignees combined account for 12.7% of all records, and the top 10 combined for 21.1%, so no single organization controls the field. Most of the ranking is made up of a long tail of entities with far fewer filings, some with just one or two records.
Filing peaked in 2022 at 148 records and has since eased, with the 2021-to-2024 window showing a 32% decline from 146 to 99 filings. That decline should not be read as the field going cold: publication typically lags filing by around 18 months, so 2025 and 2026 figures are still incomplete and will rise as more records publish. The more reliable read is that activity has settled below its 2022 peak rather than continuing to climb.
The evidence set is built specifically around hot spot uniformity, substrate reproducibility, shelf life and quantification difficulty, and the technology composition reflects it: G01N (material analysis and testing) touches 62.1% of records, meaning most claims are framed as detection or measurement methods built on top of a substrate rather than substrate-material claims themselves. Coating and surface deposition work (C23C) covers only 4.2% of records, which is thin relative to how often shelf-life and reproducibility failures trace back to coating chemistry. That gap is a reasonable place to look for open claim space.
The most-cited record in this dataset is a metal nanoshells patent with 675 citations, followed by early Raman optrode detection and SERS diagnostic microarray filings in the 300-400 citation range. These are foundational, early-era patents, and their high citation counts reflect age and influence within this corpus rather than current commercial relevance. Newer filings on enhancement factor or trace detection are commonly checked against this small set during prior art searches.
Based on the technology composition, coating and surface-deposition claims (C23C, 4.2% of records) and quantitative calibration or reproducibility-control methods appear less crowded than detection-method claims layered on G01N and B82Y. Durable hot-spot coatings, shelf-stable substrate packaging, and array-geometry reproducibility controls are specific sub-areas worth checking against the most-cited prior art before drafting. A targeted freedom-to-operate search against the foundational nanoshell and optrode patents is a sensible first step regardless of which branch is chosen.
Research Surface-Enhanced Raman Spectroscopy in depth with Eureka
Go past this page: query the whole surface-enhanced raman spectroscopy corpus yourself, in your own scope.
Every answer comes back with patent numbers you can open.
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.