Marine Corrosion and Offshore Maintenance Patents: Who Holds the Splash Zone
Filing peaked in 2017 at 45 records and growth has since flattened — 2021 to 2024 shows 0% change, so the field is holding its claim positions rather than expanding them. Filings peaked at 45 in 2017 and have not returned to that level since. The 2021-to-2024 window is flat at 0% growth, which reads as a mature, occupied claim space rather than a shrinking one — the 2025-2026 dip is a publication-lag artefact, not a real drop-off.
- 1FMC KONGSBERG SUBSEA AS28
- 2CLAXTON ENG SERVICES17
- 3TECH FRANCE SA16
- 4EQUINOR ENERGY AS16
- 5WELLPARTNER AS15
See the full marine corrosion and offshore maintenance 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 holds the most patents in marine corrosion and offshore maintenance?
Among the 63 ranked companies in this dataset, the leading assignee holds 28 of the 303 records in scope, well ahead of the fifth-place figure of 15 and the tenth-place figure of 10. The top 5 assignees together account for 30.4% of all records, and the top 10 account for 50.5%. That gap after the leader means competitive benchmarking should start with a short list rather than a broad survey.
Is filing activity in this field growing or slowing down?
Filing peaked in 2017 at 45 records and has not returned to that level since. The most recent complete comparison, 2021 to 2024, shows 0% growth, indicating a plateau rather than continued expansion. Figures for 2025 and 2026 should not be read as a decline, because publication lags filing by roughly 18 months and those years are still filling in.
What technology areas dominate marine corrosion and offshore maintenance patents?
E21B, covering earth and rock drilling for wells, appears in 42.6% of the 303 records, and B63B, ships and marine vessels, appears in 28.1%. Because a single record can carry multiple IPC classes, these percentages add up to more than 100%. Access-system and inspection-specific classes such as cranes and hoists (6.3%) and foundations (5.6%) are comparatively thin, marking areas with less claim density.
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 Marine Corrosion and Offshore Maintenance 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.