This dataset covers families that combine high-barrier or barrier-film terminology with a scale-up process term — roll-to-roll coating, coextrusion, vacuum deposition scale-up, or high-throughput production — and that fall under IPC classes B32B37, B29C48 or C23C14. That means it captures the manufacturing and process side of barrier film specifically, not general barrier-material chemistry claims that lack a stated production route. A material composition patent with no scale-up language attached would not appear in this corpus.

The trend shows filings at 20 in 2017, falling to a midpoint of 9 by 2022, which is consistent with early claim staking followed by consolidation rather than continued growth. It does not necessarily mean interest in the technology has fallen; it more likely means the core structural and process claim space was substantially covered by the late 2010s. Note also that the 18-month publication lag means the most recent one to two years in any trend chart will always look lower than the true filing rate.

The United States (84 records) and the European Patent Office (69 records) together account for the large majority of filings in this corpus, well ahead of WIPO PCT filings at 22. A prior art or freedom-to-operate search should therefore start with US and EPO full-text databases rather than relying on PCT publications alone, since many applicants appear to be filing directly in their core commercial markets rather than pursuing broad international coverage.

The C23C coating and surface deposition subclass appears in 68 of 247 families, notably fewer than the 207 that touch B32B layered-product claims and the 139 that touch B29C shaping claims. That gap suggests process-level vacuum deposition claims are less densely occupied than structural laminate claims, though it is not proof of true white space — a deeper read of those 68 records is needed before filing to confirm the specific process steps still available.

Not necessarily. Companies including NOVA Chemicals (International) S.A., Cryovac, Inc. and 3M Innovative Properties Company (USA) all show zero filings in the most recent tracked year, but publication lag of roughly 18 months means recent applications from these companies may simply not have published yet. A more reliable read comes from looking at their filing history over several years rather than the single most recent data point, and from checking their portfolios outside this specific search string.