Wet fractionation uses aqueous extraction, typically an alkaline or neutral solution followed by isoelectric precipitation, to separate protein from other plant components, and this route dominates the extraction claims in this dataset. Dry fractionation instead uses mechanical means such as air classification to separate protein-rich and starch-rich fractions without water, avoiding the wastewater and yield-loss issues associated with wet processing. Patent claims differ accordingly: wet-route claims tend to specify pH, precipitation agents and solvent composition, while dry-route claims focus on particle size, air-flow parameters and separation efficiency. Antinutrient removal and off-flavour profiles also differ meaningfully between the two routes, which is why the search scope in this landscape treats both explicitly.

Off-flavours in plant protein isolates, commonly described as beany, grassy or bitter notes, arise largely from lipoxygenase-driven oxidation of fatty acids during processing and from residual saponins and phenolics carried through extraction. Patents in this landscape address the problem through several routes: enzymatic treatment to deactivate lipoxygenase, solvent washing steps targeted at volatile compound removal, and reformulated precipitation conditions that reduce co-extraction of flavour-active compounds. The dataset shows this as a persistent claim category rather than a solved problem, since off-flavour remediation appears alongside extraction claims across many years of filing rather than concentrating in one early wave.

The ranked leader in this dataset holds 24 of the 237 records in scope, with a fairly narrow gap down to fifth place at 13 records and tenth place at 9, indicating a genuine mid-tier of active filers rather than one dominant player. Together, the top 5 assignees account for 36.7% of all records and the top 10 for 60.3%, meaning close to 40% of filings are held by companies outside that top ten. This spread matters for freedom-to-operate work: clearing the leading portfolio does not clear the field, since a long tail of 57 ranked companies each hold smaller but potentially blocking positions.

Filing activity grew sharply from 12 records in 2021 to 32 in 2024, a 167% increase, with 2022 marking the highest single year on record so far at 32. Counts for 2025 and 2026 appear lower, but that reflects the roughly 18-month lag between when a patent is filed and when it publishes, not a genuine drop in filing activity. Treat any year within roughly the last 18 months as incomplete data rather than as evidence of a slowdown; the underlying growth trend through the last complete year, 2024, is upward.

The technology composition data shows heavy concentration in A23J (proteins and food peptides, 79.3% of records) and A23L (foods and beverages, 66.7%), while application-specific classes such as A23P (food shaping, 10.1%), A23G (confectionery, 8.9%) and A21D (baking, 7.6%) carry far fewer filings. That gap suggests downstream application claims, tying a specific isolate or off-flavour treatment to a defined food format, are less crowded than composition and extraction claims themselves. Sub-areas like enzymatic beany-note remediation, antinutrient removal specifically within dry fractionation, and pilot-scale yield-loss reduction also show thinner coverage relative to the core extraction claims, making them worth a closer novelty search before assuming the space is occupied.