This dataset covers 619 published records classified under B65D and B65B, spanning filings from 2017 through the 2026 data cut-off. Japan is the leading receiving office with 202 records, followed by South Korea with 108 and China with 81. Europe (EPO) and the United States trail at 58 and 35 respectively, with 34 filed via the WIPO PCT route, so any freedom-to-operate check should prioritise the Japanese and Korean registers first.

The assignee ranking covers 100 companies across the 619 records, and it is a full ranking rather than a top-50 or top-100 cut. The single leader holds 55 records, fifth place holds 18, and tenth place holds 8; together the top 5 account for 23.6% of all records and the top 10 for 31.0%. That leaves roughly two-thirds of the field spread across a long tail of smaller filers, so competitive monitoring needs to look well past the leading names.

B65D, the broad containers-and-packaging class the search was scoped to, covers 82.7% of the 619 records. Within that, B32B layered products and laminates appears in 37.6% of records — well ahead of B65B packaging and wrapping (19.2%) and food-related classes like A23L (13.4%). This says most differentiating claim language is written around the laminate film stack — substrate, anchor coat and barrier layers — rather than pouch shape or closure design.

Filing activity peaked at 38 records in 2020, eased slightly, then grew again from 18 filings in 2021 to 32 in 2024 — a 78% increase over that three-year span. 2024 is the most recent year that can be read as essentially complete; because publication lags filing by roughly 18 months, the 2025 and 2026 figures will continue revising upward and should not be read as a decline. On the evidence available, the field is still expanding rather than contracting.

US20250353650A1, assigned to Toppan Holdings and published 2025-11-20, claims a laminate combining a polyolefin substrate layer, an anchor coat layer with a specified composite elastic modulus range (3.5 to 6.5 GPa) and thickness range (0.4 to 3.0 micrometres), and an inorganic barrier layer. Anyone designing a competing barrier laminate for abuse resistance and adhesion should check whether their anchor coat's modulus and thickness fall inside that claimed window, since that numeric range is the specific point a design-around needs to clear. It sits within the wider B32B laminate class that already covers 37.6% of records in this field, so it is one of many overlapping barrier-layer claims rather than an isolated one.