Trivalent Chromium Electrolyte Patents: Leaders & White Space 2026
- One assignee leads the ranked field with 11 records, well ahead of a fifth-place company at 5 and a tenth-place company at 2 — a leader with a long tail behind it.
- Filings peaked at 5 in 2021 and fell to 0 by 2024, a documented -100% swing that predates the 18-month publication lag affecting 2025-2026 data.
- 96.1% of the 51 records in scope sit in C25D (electroplating), leaving water-treatment integration and layered-product claims almost untouched by comparison.
Filing growth compares 2021 (5 records) with 2024 (0) — 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.
What this landscape covers
Trivalent chromium electrolyte chemistry replaces hexavalent chromium baths with a lower-toxicity chromium III system, and the patent record here spans 51 published records filed between 2015 and mid-2026. The scope is defined tightly around bath chemistry, colour matching, microcrack structure, current efficiency, deposit hardness and waste treatment — so this is a chemistry-and-process landscape, not a general electroplating one. Publication lag means the 2025-2026 count is still filling in and should not be read as a drop-off.
Filing activity in this set is concentrated around a small number of long-standing industrial platers and specialty chemical suppliers, with a handful of individual inventors holding older foundational patents. The receiving-office spread — led by the United States, then Canada, Europe, the United Kingdom, Australia and India — points to a technology prosecuted primarily where automotive and industrial plating capacity sits.
Filing trend and technology composition
Two views of the same 51-record set: how filing activity moved year over year, and how those records distribute across IPC subclasses.
A sharp peak, then a documented drop
Filings rose to a peak of 5 in 2021, then fell to 0 by 2024 — a -100% swing over that three-year span. That decline is measured on complete years only; 2025 and 2026 figures are still incomplete because publication typically lags filing by around 18 months, so no conclusion should be drawn yet about whether activity is genuinely tapering.
Electroplating dominates the classification mix
C25D (electroplating & electroforming) covers 96.1% of the 51 records in scope, confirming this is overwhelmingly a bath-and-process landscape. B32B (layered products), C23C (coating & surface deposition) and C02F (water & wastewater treatment) each appear in a small minority of records, since a single record can carry more than one IPC class.
Shares are the percentage of the 51 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Trivalent Chromium Electrolyte Chemistry with Eureka
This page is one run against one query. Ask Eureka your own question about trivalent chromium electrolyte chemistry and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited records
US9758884B2 — Color control of trivalent chromium deposits
A method of adjusting and controlling the color of trivalent chromium deposits is provided. The method includes measuring the color of a trivalent chromium deposit standard, adding one or more color enhancing additives to a trivalent chromium electrolyte, contacting the substrate with that electrolyte to deposit trivalent chromium, measuring the resulting color, comparing it to the standard, and adjusting the additive amount if necessary.Filed by MacDermid Acumen, Inc.; published 2017-09-12.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US4477318A | Trivalent chromium electrolyte and process employing metal ion reducing agents | 32 |
| 2 | US4477315A | Trivalent chromium electrolyte and process employing reducing agents | 28 |
| 3 | US4617095A | Electrolytic post treatment of chromium substrates | 26 |
| 4 | US20130213813A1 | Color Control of Trivalent Chromium Deposits | 20 |
| 5 | US4392922A | Trivalent chromium electrolyte and process employing vanadium reducing agent | 14 |
| 6 | GB2141138A | Trivalent chromium electroplating electrolytes and rejuvenation thereof | 12 |
| 7 | US4439285A | Trivalent chromium electrolyte and process employing neodymium reducing agent | 11 |
| 8 | GB2086939A | Trivalent chromium electrolyte and process employing vanadium reducing agent | 7 |
| 9 | US20180266004A1 | Multicorrosion Protection System for Decorative Parts with Chrome Finish | 5 |
| 10 | CN104160069A | 三价铬沉积物的颜色控制 | 4 |
Ranked by citation count within this searched corpus. Older filings accumulate more citations simply by being available longer, so treat this as a signal of influence on later claim drafting, not of current commercial relevance.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers mean for a filing decision
Three findings that shape where a new trivalent chromium filing would land, and how crowded that ground already is.
A clear leader, then a long tail
The leading assignee holds 11 records in the ranked set of 10 companies, against 5 at fifth place and 2 at tenth. That gap suggests one organisation built a durable filing programme around bath chemistry while later entrants filed narrower, single-purpose claims.
Activity fell sharply after 2021
The 2021 peak of 5 filings gave way to zero complete filings by 2024. Because 2025-2026 data is still incomplete due to publication lag, this decline should be read as a documented historical swing, not as evidence the field has gone quiet today.
Electroplating claims dominate the mix
Almost every record in this set sits in C25D, electroplating and electroforming. The small counts in B32B, C23C and C02F point to adjacent integration work — layered substrates, surface coating combinations, and waste treatment — that has drawn far fewer filers.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to trivalent chromium electrolyte chemistry, with the prior art for and against each one.
Who is filing, and where the gaps sit
The ranked field is ten companies deep, with collaboration limited to a small number of recurring co-assignee pairs rather than a broad partner network.
A specialty plating chemistry supplier out front
The leading assignee's record count is more than double the fifth-place company's, consistent with a sustained programme of bath-chemistry and color-control filings rather than a single burst of activity.
Filing is mostly solo, with a few recurring pairs
Only six co-assignee pairings appear across the set, the strongest linking a specialty chemistry supplier with an automotive OEM, and a second linking a chemical supplier with an individual inventor. This points to occasional joint development rather than an open ecosystem.
All leading assignees show zero in the latest year
Every one of the top assignees shows zero filings in the latest year tracked. Given the 18-month publication lag, this is expected for 2025-2026 and should not be read as any of these companies having exited the space.
| Assignee | Recent year | YoY |
|---|---|---|
| MacDermid Acumen, Inc. | 0 | — |
| OMI International Corporation | 0 | — |
| ENTHONE GMBH | 0 | — |
| Tata Steel Nederland Technology B.V. | 0 | — |
| MacDermid Enthone LLC | 0 | — |
| Volkswagen AG | 0 | — |
| TOMASZEWSKI THADDEUS W | 0 | — |
| HOOKER CHEM CORP | 0 | — |
Where to take this analysis
The published record gives a view through mid-2026, with the most recent two years still incomplete. Two directions make sense from here.
Track whether 2025-2026 filings recover once lag clears
The 2021-to-2024 drop is documented, but 2025-2026 figures will keep updating as publications catch up. Re-checking this trend in a year will show whether the field is genuinely quieter or simply mid-lag.
Monitor this landscape in EurekaMap the under-claimed branches before filing
Waste treatment integration and layered-substrate work show far fewer filings than core bath chemistry. A freedom-to-operate check focused on these adjacent classes is worth doing before drafting a new claim.
Run a white space search in EurekaCommon questions on trivalent chromium electrolyte patents
Within the ranked set of 10 companies in this dataset, one assignee leads with 11 records, well ahead of the fifth-place company at 5 and the tenth-place company at 2. That gap indicates a sustained filing programme rather than a single patent family, likely built around bath chemistry and color-control claims. Newer entrants and individual inventors hold smaller, narrower positions further down the ranking.
Filings peaked at 5 in 2021 and fell to 0 by 2024, a documented -100% change over that three-year span. However, 2025 and 2026 figures are still incomplete because patent publication typically lags actual filing by around 18 months, so this should not be read as current inactivity. A fair reassessment of momentum needs another year or two of publications to clear the lag.
US9758884B2, assigned to MacDermid Acumen, Inc. and published in 2017, claims a method for adjusting and controlling the color of trivalent chromium deposits by measuring a color standard, adding color-enhancing additives to the electrolyte, depositing chromium, and iteratively comparing and adjusting the additive dose against that standard. It is a process patent centred on color matching rather than the base electrolyte formulation itself. Anyone building a color-control step into a trivalent chromium plating line should review its claim scope before finalising an additive-dosing method that follows the same measure-adjust-compare loop.
IPC classification shows 96.1% of the 51 records in scope sit in C25D, electroplating and electroforming, while B32B (layered products), C23C (coating and surface deposition) and C02F (water and wastewater treatment) each appear in only a small minority of records. That skew suggests waste-stream recovery from chromium III baths and layered-substrate integration are comparatively under-claimed relative to the core bath chemistry itself. These are reasonable areas to search more closely before assuming freedom to operate, precisely because fewer filings means fewer data points, not necessarily fewer obstacles.
The receiving-office data in this set shows the United States leading with 14 filings, followed by Canada with 8, Europe (EPO) with 7, the United Kingdom with 5, and Australia and India with 3 each. This spread tracks where automotive and industrial plating capacity is concentrated rather than any single dominant jurisdiction. A company assessing regional freedom to operate should treat the US and Canadian filings as the densest prior art to clear first.
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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.