The most-cited records in this dataset trace back to General Electric's original silicone business, with US6136039A, US6124407A and the related silane-copolymer coating patents carrying the heaviest citation loads. These are older filings, several from the late 1990s and early 2000s, so their influence reflects foundational compositional claims rather than current filing activity. Later consolidation moved much of this portfolio into today's major silicone specialists, so checking current assignee-of-record is essential before relying on the original filer name.

No — filings peaked at 48 in 2021 and have declined since, with the 2022 midpoint already down to 24. The 2026 figure looks very low, but that is largely a publication-lag artefact since patents typically publish around 18 months after filing, so the true 2025-2026 filing rate is understated in the raw counts. Even accounting for that lag, the broader trend across the dataset is flat-to-declining rather than growing.

The IPC composition data shows A61K (medicinal preparations, 83 records) and B29C (shaping of plastics, 66 records) trailing well behind the core C08L, C08K and C08G codes, which suggests device-integration and processing-specific applications of condensation-cured silicone are less densely claimed than bulk composition work. Coatings and adhesives (C09D, C09J) form a healthier secondary cluster but still sit far below the core. A narrower claim targeting a specific shaping step, medical device format, or additive combination is more likely to find open space than a new bulk-composition claim.

US5420196A, assigned to General Electric and filed in 1995, claims a one-component room-temperature-vulcanizable silicone elastomer with primerless adhesion specifically to polyacrylate substrates for sealant use. It only blocks formulations that combine all three elements — one-component RTV cure, no primer step, and acrylate-targeted adhesion — so two-component systems, primed systems, or different substrate targets fall outside its specific scope. Given its age, term-expiry questions are relevant, but status should be confirmed directly rather than inferred from the filing date alone.

The United States leads with 238 records in this dataset, followed by the European Patent Office at 189, then Japan at 78 and WIPO PCT filings at 75, with Canada and Australia further behind. That distribution reflects where the historical silicone majors — largely US, European and Japanese chemical companies — have concentrated their filing strategy. A PCT filing strategy alongside direct US and EPO filings remains the norm for assignees seeking broad coverage in this field.

Yes, though the dataset shows only 10 co-assignee pairs overall, meaning most filings are single-assignee. The strongest pairing links two Dow entities at 18 shared filings, consistent with an internal corporate-structure split rather than a cross-company collaboration. Two other pairs, both around 15 shared filings, link a French silicone specialist with academic research institutions, pointing to university-industry collaboration on more exploratory chemistry rather than commercial-scale production claims.