The ranked assignee list contains 22 companies, and it is concentrated rather than flat: the leading assignee holds 10 of the 56 records in scope, the fifth-ranked holds 4, and the tenth-ranked holds 3. Together the top 5 account for 46.4% of all records and the top 10 account for 75.0%. That means most freedom-to-operate and licensing due diligence can focus on a small group rather than the full ranked list.

Filing peaked in 2021 at 12 records and had fallen to 6 by 2024, a 50% decline over that three-year span, which is the most recent period reliable enough to compare since publication lags filing by roughly 18 months. Years 2025 and 2026 will fill in further as those applications publish, so the recent apparent drop should not yet be read as the technology cooling further. The 2021 peak likely reflects a cluster of applicants entering around the same time rather than a single triggering event visible in this data.

Claims cluster heavily in layered products and laminates (B32B, 46.4% of the 56 records) and containers and packaging (B65D, 37.5%), with polymer processing and solutions (C08J, 35.7%) close behind. Smaller clusters appear in polymer compositions, smokers' requisites, pulp and paper, and building structures, each under 10% of records. This distribution shows most inventive effort going into converting and lamination of existing biopolymer chemistries into packaging formats, rather than into new base polymers.

US20140349045A1 covers a laminated packaging material with a bioplastic sealant layer and a cellulose barrier layer, both compostable under uncontrolled conditions, bonded with a water-based adhesive that keeps polyurethane or acrylic content under 0.1% of dry weight and uses a hydroxyl or aziridine cross-linking coreactant. It does not block barrier coatings generally; it blocks a fairly specific adhesive chemistry and weight-percentage threshold applied to a bioplastic-sealant-plus-cellulose-barrier laminate structure. A design-around would look at different adhesive chemistries entirely, or at barrier layers that are not cellulose-based.

The technology composition data shows a sharp drop-off outside packaging: building structures (E04B) and foundations (E02D) each sit at only 5.4% of the 56 records despite the same barrier chemistry being technically transferable to construction moisture barriers. Smokers' requisites (A24F) and pulp/paper compositions (D21H) sit similarly low at 7.1% each. These lower-density branches are where a first claim faces less accumulated prior art, though lower density can also mean lower commercial interest rather than pure opportunity, so it is worth checking demand alongside claim space.