Oil Oxidation Stability Patents: Top Companies & Trends 2026
Oil Oxidation Stability and Frying Patents: Who Leads and Where Filings Concentrate
Concentrated at the top. The top 5 assignees hold 53.1% of all 145 records in scope, and the top 10 hold 75.9% — this field is not fragmented. Filings peaked in 2020 at 6 records. Over the last fully comparable span, 2021 (3 records) to 2024 (2 records), volume fell 33% — a real pullback, though 2025 and 2026 figures are still filling in and should not be read as a continuation of that decline.
- 1NIPPON OIL CORP27
- 2EXXONMOBIL TECHNOLOGY & ENGINEERING CO16
- 3CHEVRON ORONITE CO LLC14
- 4MITSUBISHI OIL CO LTD10
- 5NIPPON OIL CO LTD10
See the full oil oxidation stability and frying analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions on this landscape
Who are the leading patent holders in oil oxidation stability technology?
The assignee ranking for this dataset covers 40 companies, with the leader holding 27 of the 145 records in scope. The top 5 combined hold 53.1% of all records and the top 10 hold 75.9%, so the field is concentrated among a small group of long-standing filers rather than spread evenly. Most of these leaders are established petroleum and lubricant companies rather than edible-oil or food-processing specialists, which reflects the dataset’s skew toward C10M lubricant classes. Anyone assessing competitive position should treat the top 10 as the practical benchmark set.
Is patent filing activity in this area growing or slowing down?
Filing activity peaked in 2020 at 6 records and declined from 3 in 2021 to 2 in 2024, a 33% drop over that span. Because publication typically lags actual filing by around 18 months, records from 2025 and 2026 are still incomplete and should not yet be read as confirming or reversing that decline. Based on the last fully comparable years, the honest read is a real pullback through 2024, with the most recent trend still unresolved. Anyone tracking momentum should revisit this figure once 2025 filings finish publishing.
What patent classes cover oil oxidation stability and frying oil degradation?
The dominant classes are C10M (lubricants), present in 80.7% of the 145 records, and C10N (lubricant properties), present in 46.9%. Smaller but notable classes include C10G (hydrocarbon refining, 12.4%), C10L (fuels, 8.3%) and C21D (metal heat treatment, 7.6%), reflecting shared base-oil chemistry across industrial applications. Edible-oil-specific class A23D and analytical class G01N each appear in only 5.5% of records. Because a single record can carry several IPC classes, these percentages sum to more than 100% and should not be added together.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Oil Oxidation Stability and Frying covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.