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Run your analysis now →Filing growth compares 2021 (4 records) with 2024 (17) — 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 407 records in scope (CR5), not by the ranked leaders only.
Roller compaction and dry granulation patents cluster around a narrow set of process control parameters: ribbon density, roll gap control, nip angle, fines recycle and granule strength. These are the levers that separate a workable continuous manufacturing line from one that jams, segregates, or produces out-of-spec granules, and the claim language in this dataset tracks them closely. The corpus spans 407 published records filed or published between 2015 and mid-2026, drawn from a search that pairs the core processes with their governing process parameters.
Filing activity is concentrated in pharmaceutical formulation, but the underlying compaction and milling mechanics also show up in powder metallurgy, plastics shaping and additive manufacturing filings — a reminder that the physical problem of turning loose powder into dense, flowable granules is shared across industries even where the claim language and regulatory context differ sharply.
The figures below come directly from the 407 records in scope and the 98-company assignee ranking the dataset returns in full.
Annual filings peaked at 41 in 2018, fell through the early 2020s to a low of 4 in 2021, then climbed back to 17 by 2024 — a +325% increase over that three-year span. 2025 and 2026 figures are still filling in as publication lags filing by roughly 18 months, so the most recent two years should not be read as a slowdown.
A61K (medicinal preparations) appears on 58.7% of the 407 records and A61P (therapeutic activity) on 30.5%, confirming the pharmaceutical center of gravity. Smaller but non-trivial shares in B01J, A23K, B22F, B29C and B33Y point to compaction and granulation claims reaching into catalysis supports, animal feed, powder metallurgy, plastics and additive manufacturing feedstock — each a distinct filing context worth checking separately before assuming freedom to operate.
Shares are the percentage of the 407 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
This page is one run against one query. Ask Eureka your own question about roller compaction and dry granulation and every answer comes back with the patent numbers behind it.
Try EurekaThe filing covers a process for preparing a pharmaceutical composition combining piboserod or a pharmaceutically acceptable salt with excipients by forming the active into granules through a dry granulation process, preferably roller compaction followed by milling to a suitable particle size, producing granules of increased particle size and/or compaction relative to the untreated active.Filed by GLAXO GROUP LIMITED, published 2005-04-07 as US20050075335A1.


| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20040192690A1 | Novel formulations and method of treatment | 71 |
| 2 | WO2001060842A2 | PROCESS FOR MAKING GRANULATED N-[N-(3,3-DIMETHYLBUTYL)-L- alpha -ASPARTYL]-L-PHENYLALANINE 1-METHYL ESTER | 45 |
| 3 | US20110135739A1 | Oral Formulations of a Hedgehog Pathway Inhibitor | 43 |
| 4 | US20080087044A1 | Selective batching for boron-containing glasses | 42 |
| 5 | US6579953B1 | Application of water-soluble or water-dispersible polymerizates which contain poly-ether and which are used a… | 41 |
| 6 | US20080039621A1 | Low-substituted hydroxypropylcellulose powder and method for producing the same | 36 |
| 7 | US20020001652A1 | Process for making granulated N-[N- (3, 3-dimethylbutyl) -L-alpha -aspartyl] -L- phenylalanine 1-methyl ester | 36 |
| 8 | US20180369909A1 | Additive manufacturing material for powder lamination manufacturing | 35 |
| 9 | WO2011057222A1 | Oral formulations of a hedgehog pathway inhibitor | 29 |
| 10 | US20080089853A1 | Amphoteric Ethyl Methacrylate Copolymers and Use Thereof | 29 |
Citation counts reflect influence inside this searched corpus and skew toward older filings; they are not a measure of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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 →When it has to run inside your own pipeline.
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Browse MCP servers →Three patterns stand out once the ranking, trend and classification data are read together.
The top 5 assignees account for 182 of the 407 records in scope, and the top 10 extend that to 63.6%. That leaves a long tail across the remaining ranked companies, most holding only a handful of families — the classic signature of a technique with a few dominant formulators surrounded by narrower, opportunistic filers.
After the 2018 peak of 41 filings, annual counts declined into the early 2020s before rebounding to 17 by 2024, a +325% rise over three years. That recovery suggests renewed investment in continuous manufacturing and dry granulation process control rather than a mature, settled field.
Medicinal preparations claims dominate, yet B22F, B29C and B33Y each appear on a meaningful minority of records. Teams working outside pharma formulation should not assume the prior art is thin just because most filers are drugmakers.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to roller compaction and dry granulation, with the prior art for and against each one.
The leader in this ranking holds 65 records against a fifth-place figure of 21 and a tenth-place figure of 15 — a steep drop-off that defines the competitive shape of the field.
The top-ranked company's 65 records sit far above the fifth-place figure of 21, a gap wide enough that displacing the leader on breadth of filings alone is unrealistic; the more useful question is which specific claims within that portfolio are actually load-bearing.
Several of the most active historical assignees show zero filings in the latest tracked year, and one shows a -50% year-on-year change. Given the ~18-month publication lag, this is as likely to reflect filings still working through the pipeline as a genuine pullback.
Ten co-assignee pairs appear in the dataset, with the strongest pairings recurring across multiple records. That points to established formulation partnerships rather than one-off joint filings, and it is worth checking whether a target company's exposure runs through one of these pairs before approaching either party alone.
| Assignee | Recent year | YoY |
|---|---|---|
| AstraZeneca AB | 1 | -50% |
| Glaxo Group Limited | 0 | — |
| Tesaro Inc | 0 | — |
| Celgene Corp | 0 | — |
| Merck Sharp & Dohme Corp | 0 | — |
| Agios Pharmaceuticals Inc | 0 | — |
| Omnigen Research LLC | 0 | — |
| Fujimi Incorporated | 0 | — |
The dataset points to specific next steps depending on whether the goal is freedom to operate, licensing, or new filing strategy.
With 44.7% of records held by five assignees, a claim-by-claim review of their granted independent claims is a faster path to a freedom-to-operate view than a broad keyword search.
Explore assignee claims in EurekaRoll surface sealing, fines recycle control and in-line ribbon density monitoring show thinner filing density than the core process claims and merit a dedicated novelty search before drafting.
Run a white space search in EurekaBecause publication lags filing by roughly 18 months, the 2025-2026 records in this dataset are incomplete. Revisit the trend in two to three quarters to see whether the 2021-2024 growth continued.
Set up monitoring in EurekaThe dataset's assignee ranking shows one company clearly ahead with 65 records, well above the fifth-ranked assignee's 21. The top 5 assignees together hold 182 of the 407 records in scope, or 44.7%, and the top 10 extend that to 63.6%. Beyond that leading group, the ranking includes 98 companies in total, most holding only a small number of families, so the field combines a concentrated top tier with a long tail of narrower filers.
Filings peaked at 41 in 2018, fell to a low of 4 in 2021, and then rebounded sharply to 17 by 2024 — a +325% increase over that three-year span. Because publication typically lags filing by around 18 months, the lower counts shown for 2025 and 2026 are an artefact of incomplete data rather than evidence of a real slowdown. Treated on its own terms, 2024 is the most recent year that can be read as a complete signal, and it points to renewed rather than declining activity.
Medicinal preparations (A61K) and therapeutic activity (A61P) dominate, appearing on 58.7% and 30.5% of the 407 records respectively, reflecting the technique's heavy use in tablet and oral dosage manufacturing. Smaller but real shares also appear in heterocyclic compounds, catalysis and chemical processing, animal feed, powder metallurgy, plastics shaping and additive manufacturing. Anyone working outside pharmaceutical formulation should still check these adjacent classes rather than assume the prior art is limited to drugmakers.
This Glaxo Group filing claims a process for preparing a pharmaceutical composition containing piboserod or a pharmaceutically acceptable salt by forming it into granules through dry granulation, preferably roller compaction followed by milling to a suitable particle size. It is one representative record in a much larger set of process claims covering roller compaction, and its scope is specific to that active compound and its salts rather than to roller compaction generally. Anyone assessing freedom to operate should read its granted claims directly rather than infer scope from the abstract alone.
Relative to the dense core claims around ribbon formation and milling, narrower process-control branches such as roll surface sealing design, fines recycle loop control, nip angle sensing and in-line ribbon density monitoring show thinner filing activity in this dataset. Non-pharmaceutical applications, including continuous granulation for animal feed and granule strength for additive manufacturing feedstock, likewise carry smaller shares of the 407 records. These are reasonable starting points for a dedicated novelty search, though thinner filing density should be confirmed with its own targeted search rather than assumed from the topline classification counts.
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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.
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