This dataset identifies 17 published patent families filed between 2015 and 2026 that combine molded pulp or fiber-based packaging terminology with process-specific claims such as forming process, drying energy, wet strength, or dimensional accuracy. That is a small, tightly scoped corpus rather than the full universe of molded-fiber patents, because the search string requires process-level language, not just material or product description. A broader search on molded fiber packaging generally would return a larger number, but with much weaker relevance to manufacturing method.

The assignee list is led by a small group of filers including Kemira Oyj, a Stora Enso-affiliated entity, Valmet Technologies, and Nestle, alongside smaller Chinese and academic filers. None of these assignees show growth in the most recent tracked year, and several show a full drop to zero filings year over year, indicating the leadership positions were established earlier rather than being actively contested now. Ranking by total filings, rather than recent momentum, is the more reliable way to read leadership in a corpus this size.

Filing activity peaked in 2022 at seven records out of 17 total, and has declined since, with recent-year momentum for every tracked assignee sitting at zero. Because publication lags filing by roughly 18 months, the most recent one to two years in any filing trend will understate true activity, so some caution is warranted before concluding the field is fully quiet. Even accounting for that lag, the concentration around a single 2022 peak suggests this is a field that saw a defined claiming window rather than sustained year-on-year growth.

Nearly all activity in this corpus, 17 of 17 records, falls under IPC D21J, which covers fibreboard manufacture and moulded pulp articles. A smaller set of four records also touches D21H, pulp and paper compositions, and single records appear in adjacent classes covering laminates (B32B), containers (B65D), pulp production (D21C), paper stock treatment (D21D), mechanical paper working (B31F), and object sorting (B07C). That distribution shows claim activity is overwhelmingly about the moulding and forming process itself rather than the fiber material or the finished packaging product.

The clearest white space sits in the IPC subclasses that appear only once in this corpus: barrier-layer lamination onto molded pulp, mechanical post-forming treatments, and pulp stock treatment aimed at dimensional accuracy. Each of these has minimal prior art within this dataset relative to the dense D21J core, which means a well-drafted claim in one of these branches faces a shallower prior-art bar. That said, a shallow bar within this specific search string does not guarantee a shallow bar in the wider patent literature, so any filing strategy built on this observation should be checked against a broader prior-art search before drafting.