One assignee leads the ranked list with 83 records, well ahead of the rest of the field. The top five assignees combined hold 226 records, 31.4% of all 720 records in scope, and the ranking runs 100 assignees deep, so beyond the leader the field is a long tail of occasional filers rather than a handful of dominant players. Anyone doing competitive tracking should watch the leader closely but not assume the rest of the market is empty — it is fragmented, not absent.

Filing rose from 14 records in 2017 to a peak of 38 in 2021, then eased to 32 by 2024 — a -16% change over that three-year span. That reads as a plateau after a growth run rather than a collapse. Figures for 2025 and 2026 will keep revising upward as publications catch up, since publication typically lags filing by around 18 months, so it is too early to call the recent years a decline.

The record splits across two main uses: polymer composition and processing (C08L at 41.8% of 720 records, C08J at 23.1%) aimed largely at packaging and films, and medical applications, with A61F implant and prosthesis claims at 18.2% and A61K medicinal-preparation claims at 10.3%. Packaging-specific classes B32B (laminates) and B65D (containers) each sit in the mid-teens by share, confirming that packaging is a major but not sole application. A record can carry multiple classes, so these shares are not mutually exclusive.

US20110195210A1, filed by Fina Technology, covers injection stretch blow molded (ISBM) articles made by contacting a propylene-based polymer with polylactic acid to form a blend, then molding that blend into a preform and stretch-blowing it into a finished article such as a bottle. That claim scope is specific to the polypropylene-PLA combination processed by ISBM into blown articles; it does not on its own block PLA blends with other base polymers or blends processed by other methods. Anyone targeting PLA-polypropylene bottles via stretch-blow-molding should read the full claim set closely before designing a similar process.

The composition data shows heavy density in C08L polymer compositions and C08J processing, with A61F medical and B65D/B32B packaging classes all carrying real but secondary shares. Branches that combine PLA blends with additive classes (C08K, at 9.6% of records) or condensation-polymer chemistry (C08G, 9.9%) carry comparatively thinner claim density than the core composition and packaging classes, suggesting more room for a narrowly drafted first claim there. Any white-space conclusion should be checked against the specific claim language in those classes, not the class share alone.