One assignee leads with 46 of the 151 records in scope, and the top five assignees together hold 110 records, or 72.8% of the field. That level of concentration means most of the core gel and particle-gel composition space is already claimed by a small number of companies. Anyone evaluating this space should treat the leader’s portfolio as the first thing to check for freedom-to-operate purposes, rather than assuming the field is open.

Filing activity peaked at 26 records in 2021 and had fallen to 5 by 2024, an 81% decline over that three-year span. However, patent publication typically lags the actual filing date by about 18 months, so the 2025 and 2026 figures in any dataset are still incomplete. The honest read is that the field cooled significantly after 2021, but it is too early to call the current trajectory beyond 2024.

Crosslinked gelant systems are pumped into the formation as a liquid and crosslink in place, while preformed particle gels are manufactured and crosslinked beforehand, then injected as discrete particles that swell and plug high-permeability channels. The preformed particle gel route appears repeatedly in the most-cited and representative filings in this dataset, including re-crosslinkable variants designed to improve durability under reservoir conditions. Each approach carries different placement and thermal-stability trade-offs, which is why both remain active claim areas rather than one displacing the other.