The dataset ranks 100 companies by patent family count, and the leading assignee holds 82 of the 1,086 records in scope, ahead of a mid-tier band running from 44 records at fifth place down to 29 at tenth. The top five combined account for 288 records, or 26.5% of the field, and the top ten for 461 records (42.4%). That leaves the majority of filings outside the ranked leaders, spread across specialty chemical suppliers and oilfield service companies rather than concentrated in one or two firms.

Filings peaked at 95 in 2017 and declined through the early 2020s before climbing again, rising from 37 in 2021 to 64 in 2024 — a 73% increase over that three-year span. The apparent drop in 2025 and 2026 is an artefact of publication lag, since granted and published filings typically trail the actual filing date by around eighteen months. Read the recent uptick through 2024 as the more reliable signal of current activity.

Both are chemical additives used to manage wax crystallisation in crude oil and refined fuels, but they act at different points in the process: pour point depressants modify wax crystal structure to keep oil flowing at lower temperatures, while paraffin inhibitors are typically dosed to prevent wax from depositing on pipe walls and equipment during production and transport. Many recent filings, including the representative Baker Hughes filing in this dataset, combine both functions in a single stabilised copolymer product rather than claiming them separately.