Titanium Sponge Patents: Who Leads, Where the Gaps Are 2026
- 33.6% sits with five filers. The top 5 assignees combine for 154 of 459 records in scope, a concentration that makes freedom-to-operate checks against a short list worthwhile before broader searching.
- Filing has cooled, not stopped. From 2021 to 2024 — the last year with complete data — filings moved from 6 to 5, a -17% shift, after peaking at 12 in 2019.
- Metal extraction claims dominate the field. C22B covers 73.4% of the 459 records, while adjacent classes like C01D alkali-metal compounds sit at just 6.3%, a gap worth checking before assuming the space is crowded everywhere.
Filing growth compares 2021 (6 records) with 2024 (5) — 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 459 records in scope (CR5), not by the ranked leaders only.
What this dataset covers
This landscape draws on 459 published patent records filed or published between 2015 and mid-2026 that reference titanium sponge production, the Kroll process, or titanium tetrachloride reduction alongside magnesium reduction, vacuum distillation, reactor productivity, chlorine recycle, energy intensity or sponge classification. The scope spans the core reduction chemistry through downstream powder and alloy handling, so a single record can touch several stages of the process at once.
Reading the field this way separates the reactor and metallurgy claims that define commercial-scale Kroll operations from the narrower powder-handling and classification patents layered on top of them. Because publication lags filing by roughly 18 months, the most recent years in any trend understate actual filing activity.
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Filing trends and technology composition
Two views of the same 459 records: how filing activity has moved year over year, and how those records distribute across IPC subclasses.
A peak in 2019, then a plateau
Filings ran from 7 in 2017 to a peak of 12 in 2019, then eased; the 2021-to-2024 span moved from 6 to 5 filings, a -17% change. Treat 2025 and 2026 figures as incomplete rather than as evidence of decline, since publication lag has not caught up with those filing years yet.
Metal extraction and refining anchors the field
C22B (metal extraction & refining) appears in 73.4% of the 459 records, far ahead of B22F powder metallurgy (17.9%) and C22C alloys (16.3%). Because a record can carry multiple IPC classes, these shares sum to well over 100% and should be read as overlap, not as a partition of the field.
Shares are the percentage of the 459 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Titanium Sponge and Kroll Process Improvements with Eureka
This page is one run against one query. Ask Eureka your own question about titanium sponge and kroll process improvements and every answer comes back with the patent numbers behind it.
Try EurekaThe records other filings build on
Method of Manufacturing Pure Titanium Hydride Powder and Alloyed Titanium Hydride Powders By Combined Hydrogen-Magnesium Reduction of Metal Halides
The invention relates to energy-saving manufacturing of purified hydrogenated titanium powders or alloying titanium hydride powders, by metallo-thermic reduction of titanium chlorides, including their hydrogenation, vacuum separation of titanium hydride sponge block from magnesium and magnesium chlorides, followed by crushing, grinding, and sintering of said block without need for hydrometallurgical treatment of the produced powders. Methods disclosed contain embodiments of processes for manufacturing high-purity powders and their use in manufacturing near-net shape titanium and titanium-alloy articles by sintering titanium hydride and alloyed titanium hydride powders produced from combined reduction routes.Filed by Advance Material Products, Inc., published 2013-11-28. Notable for combining hydrogen-magnesium reduction with vacuum separation to skip hydrometallurgical processing entirely.
View full filing →| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5935293A | Fast quench reactor method | 428 |
| 2 | US5749937A | Fast quench reactor and method | 359 |
| 3 | US5779761A | Method of making metals and other elements | 210 |
| 4 | US6821500B2 | Thermal synthesis apparatus and process | 154 |
| 5 | WO1996028577A1 | Fast quench reactor and method | 98 |
| 6 | US4687632A | Metal or alloy forming reduction process and apparatus | 96 |
| 7 | US20040208805A1 | Thermal synthesis apparatus | 85 |
| 8 | US7576296B2 | Thermal synthesis apparatus | 84 |
| 9 | US4877445A | Method for producing a metal from its halide | 74 |
| 10 | US20040123700A1 | Process for the production of elemental material and alloys | 68 |
Citation counts are drawn from within this searched corpus and skew toward older filings; they signal influence on later drafting, not current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three signals stand out once concentration, timing and claim density are read together.
A short list drives freedom-to-operate risk
The top 5 assignees account for 154 of 459 records, or 33.6% of the field. That is high enough that an early-stage FTO screen against this small set catches a meaningful share of relevant prior art before a broader search is needed.
Filing has plateaued since the 2019 peak
Filings peaked at 12 in 2019 and by the last complete year, 2024, sat at 5, down from 6 in 2021. This reads as a maturing core process rather than an abandoned one — most of the recent activity likely sits in downstream powder and alloy handling instead of the core reduction step.
Extraction chemistry is crowded, adjacent compound classes are not
C22B metal extraction and refining touches 73.4% of the 459 records, while C01D alkali-metal compounds sits at only 6.3% and C01B non-metallic elements at 9.2%. The gap suggests byproduct and reagent-recovery chemistry around the core reduction step is comparatively open.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to titanium sponge and kroll process improvements, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| WITHERS JAMES C | LOUTFY RAOUF O | 10 |
| Materials & Electrochemical Research Corp. | WITHERS JAMES C | 7 |
| Materials & Electrochemical Research Corp. | LOUTFY RAOUF O | 4 |
| Materials & Electrochemical Research Corp. | LOUTFY RAOUF | 3 |
| WITHERS JAMES C | LOUTFY RAOUF | 3 |
| Commonwealth Scientific and Industrial Research Organisation (CSIRO) | Cougar Titanium Pty Ltd | 2 |
| Commonwealth Scientific and Industrial Research Organisation (CSIRO) | WELLWOOD GRANT ASHLEY | 2 |
| Commonwealth Scientific and Industrial Research Organisation (CSIRO) | DOBLIN CHRISTIAN | 2 |
The strongest co-assignee pair in this dataset appears 10 times, well ahead of the next pairs at 7 and 4 occurrences, indicating a small number of long-running inventor-assignee collaborations rather than broad cross-company joint filing.
Who is filing, and where the gaps sit
The ranked assignee list covers 100 companies across the 459 records in scope — not a top-50 or top-100 cutoff, but the full ranking the dataset returns.
One filer well ahead of the field
The top-ranked assignee holds 36 records, noticeably ahead of fifth place at 20 and tenth place at 13. That gap between first and fifth is worth checking directly rather than assuming a gradual taper.
Half the field, then a long tail
The top 10 assignees combine for 229 of 459 records, just under half. The remaining 90 ranked companies split the other half, pointing to a genuine long tail of smaller filers alongside the concentrated leadership group.
US and EPO lead receiving offices
The United States receives the most filings at 130, ahead of the EPO at 60 and Australia at 55. Canada, WIPO/PCT and the UK follow at 41, 36 and 31 respectively, indicating filers are prioritising US and European protection first.
| Assignee | Recent year | YoY |
|---|---|---|
| Materials & Electrochemical Research Corp. | 0 | — |
| Shenzhen Sunxing Light Alloys Materials Co., Ltd. | 0 | — |
| ICSIP Pty Ltd | 0 | -100% |
| Commonwealth Scientific and Industrial Research Organisation (CSIRO) | 0 | — |
| Occidental Research Corporation | 0 | — |
| Lockheed Martin Idaho Technologies Company | 0 | — |
| Norsk Titanium AS | 0 | — |
| ATI Properties, Inc. | 0 | — |
Where to take this
The dataset points to specific next steps depending on whether the goal is freedom-to-operate, design-around, or white-space filing.
Screen the concentrated leaders first
With 33.6% of records held by five assignees, an FTO review that starts there before widening the search will catch a disproportionate share of the relevant prior art efficiently.
Run an assignee-level search in Eureka →Map the C01D and C01B gap
Byproduct and reagent-recovery chemistry sits at 6.3% and 9.2% of records respectively, well below the 73.4% claimed in core extraction. That gap is worth a dedicated novelty check before drafting.
Explore white space in Eureka →Track post-2024 filings as they publish
2025 and 2026 filing counts will keep rising as publication catches up; revisit the trend in six to twelve months before drawing conclusions about a slowdown.
Set a monitoring alert in Eureka →Common questions on this landscape
The leading assignee in this dataset holds 36 of the 459 records in scope, with the top five combined accounting for 154 records, or 33.6% of the field. That is a meaningful concentration, but it still leaves roughly two-thirds of the field spread across a long tail of smaller filers, including single-patent entrants. Anyone doing a freedom-to-operate check should start with the concentrated leaders and then widen the search rather than assuming coverage is complete after the top few names.
Filings peaked at 12 in 2019 and by 2024, the most recent year with complete data, had settled at 5, down from 6 in 2021 — a -17% change over that span. This looks more like a maturing core process than an abandoned one, since patenting activity in downstream powder and alloy handling continues. Figures for 2025 and 2026 are still incomplete because publication typically lags filing by about 18 months, so it is too early to call the current trajectory a decline.
Metal extraction and refining, IPC class C22B, appears in 73.4% of the 459 records in scope, making it by far the dominant classification. Powder metallurgy (B22F) and alloys (C22C) follow at 17.9% and 16.3% respectively. Because a single patent record often carries several IPC classes, these percentages overlap rather than summing to 100%, and they should be read as a map of claim density rather than a strict breakdown of the field.
Classes adjacent to the core extraction chemistry are comparatively light: C01D, covering alkali-metal compounds, sits at 6.3% of the 459 records, and C01B non-metallic elements and inorganic compounds sits at 9.2%, both well below C22B's 73.4%. Chlorine recycle loops, magnesium chloride electrolytic recovery, and sponge classification automation are specific sub-areas within that lighter-claimed space worth a dedicated novelty search before drafting new claims there.
US20130315773A1, assigned to Advance Material Products, Inc., covers manufacturing purified hydrogenated titanium powders through combined hydrogen-magnesium reduction of titanium chlorides, including vacuum separation of the titanium hydride sponge block from magnesium and magnesium chlorides without a hydrometallurgical step. It matters because it sits at the intersection of reduction chemistry and powder processing, two of the most heavily claimed classes in this dataset. Anyone designing a process that combines hydrogenation with vacuum separation to avoid hydrometallurgical treatment should review this filing's claim scope directly rather than relying on the abstract alone.
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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.