It refers to patent filings that combine a wire arc additive manufacturing process with an explicit durability outcome — corrosion resistance, oxidation resistance, or as-deposited service durability — rather than filings that only describe the WAAM process itself. In this dataset the search was restricted to records whose title or abstract names one of those durability outcomes directly. That makes it a narrower slice than the broader WAAM patent literature, and one where alloy chemistry and post-processing steps matter as much as the deposition method.

The dataset shows a long tail of largely independent filers rather than a small set of dominant players: 23 total families with only nine co-assignee pairings, most involving a single named inventor. Wuhan University holds the most-cited individual record, an aluminium alloy WAAM durability method, but no single assignee shows sustained multi-year filing momentum through the most recent tracked year. This is a field still being staked out rather than one with an established leader.

Filing activity stayed flat through 2022 and then rose to a peak of 13 records in 2025, out of 23 total in the dataset. That pattern is consistent with WAAM moving from lab-scale demonstration toward parts intended for corrosive or thermally cycled service, which creates a reason to claim durability outcomes rather than just the deposition process. Because publication lags filing by roughly 18 months, the 2025 figure is likely an undercount of actual filing activity, and 2026 will almost certainly be revised upward as more records publish.

Fourteen of the 23 tracked filings route through India's patent office compared with six through the USPTO, with WIPO and EPO further behind. This is unusual for a welding-adjacent metals technology, where US and European filing has historically dominated, and it suggests a concentration of academic and applied research activity in India specifically within the durability-focused subset of WAAM. Teams building a competitive or freedom-to-operate view of this space should not assume US-centric searching is sufficient.

The patent claims a wire arc additive manufacturing method for a high-strength aluminium alloy component that uses MXene nanomaterial modification of the alloy combined with a nanosecond laser beam applied during deposition, described as enhancing arc cathode atomization cleanup to remove impurities. It is the most-cited record in this dataset, with 22 citations, filed by Wuhan University. Its scope is tied to that specific modification-and-laser-cleanup combination, so WAAM work on aluminium alloys using different impurity-control methods or without MXene modification sits outside its literal claim language, though a full freedom-to-operate check should still compare claim elements directly.