Food Sterilization Patents: Leaders, Trends & White Space 2026
- China dominates filing. 12 of 13 records in this dataset were filed through the Chinese receiving office, against a single US filing — a strong signal of where equipment-level sterilization claims are being staked out.
- Filing already peaked and cooled. Activity crested at 5 filings in 2021 and had fallen to 1 by 2022, with no rebound through the most recent complete year — flat-to-declining, not an emerging wave.
- Microwave sterilization equipment leads the citation table. The most-cited records in this set are microwave sterilization devices, with one 2019 filing drawing 12 citations — well ahead of anything else in the corpus.
A small, concentrated, China-heavy filing set
This landscape covers 13 patent families filed between 2015 and 2026 at the intersection of food sterilization, aseptic processing and thermal validation — spanning ohmic heating, microwave sterilization, lethality calculation and nutrient-retention claims under IPC classes A23L3, A23C3 and A61L2. The dataset is small relative to adjacent food-processing categories, which means individual filings carry more weight in defining the state of the art than they would in a crowded field. Almost all activity sits in one IPC subclass — A23L, foods and non-alcoholic beverages — with single records scattered across sterilizing equipment, crushing/grinding, conveying, water treatment and bioreactor classes.
Filing is heavily weighted toward Chinese applicants and the Chinese receiving office, with only one US filing in the set. Publication lags filing by roughly 18 months, so the most recent year understates real filing activity, but the trend line through the last complete year already shows a clear cooling from the 2021 peak rather than a data artefact.
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Filing trend and technology composition
Thirteen families, one dominant jurisdiction and a filing curve that already peaked — the shape of this dataset tells a decision-maker as much as any single ranking.
Filing trend: a single peak, then decline
Filings ran at zero in 2017, climbed to a peak of 5 in 2021, then dropped to 1 by 2022 with no recovery through the latest complete year. That shape — a sharp single-year peak rather than a sustained ramp — is more consistent with a burst of equipment-patenting activity around one filer or one product cycle than with a broad, structural technology shift.
IPC composition: concentrated in one subclass
A23L (foods and non-alcoholic beverages) accounts for 13 of the records — effectively the entire set — with single-record appearances in A61L (sterilising and disinfecting), B02C (crushing and grinding), B03C (magnetic/electrostatic separation), B29C (plastics shaping), B65G (conveying), C02F (water treatment) and C12M (bioreactors). The long tail of one-off classifications suggests sterilization claims are being drafted alongside equipment and material innovations rather than as a distinct claim category of their own.
Shares are the percentage of the 13 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Food Sterilization and Thermal Processing with Eureka
This page is one run against one query. Ask Eureka your own question about food sterilization and thermal processing and every answer comes back with the patent numbers behind it.
Try EurekaWhat the most-cited and representative filings actually claim
US20220039436A1 — Food sterilization tube and method for making same
A food sterilization tube built from a fluoropolymer layer — a copolymer of tetrafluoroethylene and perfluoropropyl vinyl ether (PFA), fluorinated ethylene propylene (FEP), polytetrafluoroethylene (PTFE), or a combination — specified by a dielectric constant below 3 as measured by ASTM D150.Filed by Saint-Gobain Performance Plastics Corporation; published 2022-02-10. This is the only US-origin filing in the dataset and the sole entry addressing tube/conduit material composition rather than sterilization equipment or process control.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | CN110637964A | 一种微波杀菌装置 | 12 |
| 2 | CN212787306U | 一种微波杀菌装置 | 5 |
| 3 | CN105581220A | 一种连续粉体湿热杀菌设备 | 4 |
| 4 | CN210695806U | 一种微波杀菌装置 | 3 |
| 5 | CN216315348U | 一种食品灭菌装置 | 1 |
| 6 | CN215013283U | 一种应用于食品生产的蒸汽杀菌锅 | 1 |
Citation counts favour older filings within a searched corpus; treat this as a measure of historical influence on later filers, not a ranking of current technical importance.
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. Publication numbers are shown where the record carries one (6 of 6 rows); clicking a row searches Eureka by that number.
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With only 13 families, patterns here are directional rather than statistical — but the concentration by jurisdiction, IPC class and citation is consistent enough to act on.
Filing is a China story
Equipment-level sterilization patenting in this set is overwhelmingly domestic Chinese filing, with a single US filing addressing tube materials rather than process equipment. Anyone benchmarking freedom-to-operate outside China should not assume this dataset reflects global claim coverage.
Activity already crested
The filing curve peaked in 2021 and fell back to 1 filing by 2022 with no subsequent rebound through the latest complete year. That pattern reads as a short burst tied to specific product launches rather than a sustained technology build-out.
Microwave sterilization equipment sets the reference point
The most-cited filing in the set, a microwave sterilization device, draws far more citations than anything else in the corpus, with a related microwave device design close behind. Later filers in this space are building on those two records more than on any process-validation or lethality-calculation claims.
Collaboration is sparse and localised
Only three co-assignee pairs appear in the dataset, all linking the same small cluster of organisations around forestry-and-ecology and food R&D entities in Xinjiang. This is not a network of cross-industry alliances — it looks like a handful of regional institutions filing jointly on related projects.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to food sterilization and thermal processing, with the prior art for and against each one.
A fragmented field with no dominant repeat filer
Momentum data shows every tracked assignee at zero filings in the latest year — consistent with the broader cooling trend rather than any single company pulling ahead.
No active repeat filer right now
Every assignee tracked for recent momentum — spanning Chinese equipment makers, a food company and an engineering college — shows zero filings in the latest year. The 2021 peak was not sustained by any one of these organisations continuing to file.
Long tail, not a leader-and-followers shape
With 13 families spread across a wide set of named organisations, this field lacks the concentrated top-3-hold-most-claims pattern seen in denser categories. That makes it easier for a new entrant to establish a defensible position without displacing an incumbent portfolio.
Non-Chinese filers are nearly absent
Saint-Gobain Performance Plastics is the only non-Chinese-origin filer in the set, and its claim scope — tube materials — does not overlap with the equipment and process claims that dominate the Chinese filings. A Western entrant focused on sterilization process control would face a largely open field.
| Assignee | Recent year | YoY |
|---|---|---|
| Shandong Dongxuya Machinery Equipment Co., Ltd. | 0 | — |
| Qiqihar Institute of Engineering | 0 | — |
| Qingdao Longhai Food Co., Ltd. | 0 | — |
| Panshi Xingze Food Co., Ltd. | 0 | — |
| Li Peng | 0 | — |
| Xinjiang Yonglin Aquatic Grass Ecology Research Co., Ltd. | 0 | — |
| Xinjiang Academy of Forestry, Institute of Afforestation and Desertification Control | 0 | — |
| Xinjiang Xiaojinniu Food Co., Ltd. | 0 | — |
Where to take this analysis
This dataset is small enough that the next steps are about verification and scope-widening, not just more charts.
Check freedom-to-operate against the Chinese filings directly
With 12 of 13 families filed via the Chinese receiving office, any commercial plan touching microwave or continuous sterilization equipment should get those specific claims translated and reviewed rather than relying on the citation summary alone.
Explore full claim text in EurekaWiden the search to adjacent IPC classes
The single-record appearances in B02C, B03C, B29C, B65G, C02F and C12M suggest sterilization claims are being filed alongside equipment patents classified elsewhere. A broader pull across those classes may surface related filings this search string did not catch.
Run an expanded IPC search in EurekaTrack whether filing resumes past the 2021 peak
Because publication lags filing by about 18 months, it is too early to say definitively whether the 2022 drop is permanent. Re-running this trend in a year will show whether the peak was a one-off or the start of a longer decline.
Set up monitoring in EurekaCommon questions on food sterilization patents
This dataset identifies 13 patent families filed between 2015 and 2026 that combine food sterilization or aseptic processing terms with technical elements like lethality calculation, ohmic heating, microwave sterilization, nutrient retention or validation, classified under IPC codes A23L3, A23C3 and A61L2. That is a small, tightly-scoped set rather than a comprehensive count of every food-sterilization filing worldwide — broader search terms or additional IPC classes would surface more. The size of the set means individual filings, particularly the most-cited ones, carry outsized weight in defining what 'state of the art' looks like here.
No single organisation dominates this dataset; filing is spread across a range of Chinese equipment makers, food companies and research institutes, with every tracked assignee showing zero filings in the most recent year. The most-cited individual records are microwave sterilization equipment designs, which suggests technical influence is concentrated in specific product filings rather than in one company's broader portfolio. Anyone mapping this space should look at citation leaders and recent filers separately, since they are not the same organisations here.
Based on this dataset, filing activity peaked in 2021 at 5 filings and fell back to 1 by 2022, with no recovery through the latest complete year — a pattern of decline rather than growth. Because publication typically lags filing by around 18 months, the very last year in any trend chart understates true activity, so the most recent one or two years should be read with that caveat. Even accounting for that lag, the drop from the 2021 peak is steep enough to suggest a genuine cooling rather than a reporting gap.
US20220039436A1 claims a food sterilization tube built from a specific fluoropolymer layer — PFA, FEP, PTFE, or a combination — defined by a dielectric constant below 3 as measured under ASTM D150. It is a materials and construction claim for tubing used in sterilization systems, not a claim on a sterilization process, method or piece of processing equipment. That distinction matters: it blocks specific tube material formulations meeting that dielectric threshold, but it does not restrict ohmic heating methods, microwave sterilization equipment designs, or lethality validation approaches, which are the areas where most of the rest of this dataset's claims sit.
The IPC composition data shows several sub-areas — ohmic heating validation, nutrient-retention measurement, continuous powder wet-heat sterilization, sterilization tube materials, and bioreactor-integrated thermal processing — each represented by only a single record in this set. That thinness does not guarantee an area is genuinely open, since a single record can still carry broad claims, but it does mean these branches have not attracted the repeat filing seen around microwave sterilization equipment. A prior-art search focused specifically on those sub-areas, rather than the corpus as a whole, is the fastest way to confirm whether a first-mover claim is realistic.
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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.