In this scoped dataset, HIGHVAC CORPORATION accounts for all 11 records, or 100% of the set. That is not a claim about the entire global abatement equipment market, since the search was scoped tightly around point-of-use abatement and byproduct-powder terminology; a broader search covering general fab exhaust systems would likely surface other filers. Anyone assessing competitive exposure in this exact technical niche should treat this single-filer concentration as the starting point for a freedom-to-operate review.

Destruction removal efficiency (DRE) is the standard metric abatement equipment patents use to describe how completely a device destroys or removes a hazardous or greenhouse gas byproduct, such as a perfluorocompound (PFC), from a semiconductor process exhaust stream before it is released. It appears as a search term in this dataset alongside byproduct powder and uptime, both of which are practical performance criteria that abatement equipment claims are often built around. A high DRE claim typically anchors the technical differentiation in a patent's independent claims.

The dataset shows 2019 as the peak year with 11 records, followed by a drop to zero at the 2022 midpoint and in the most recent tracked year. Without additional filing-level detail it is not possible to say definitively why activity concentrated there, but a single busy year followed by a flat stretch is consistent with a filer building out a family around one core invention rather than sustaining continuous prosecution. Publication lag of roughly 18 months means the most recent one to two years will always understate true activity, so a renewed uptick may not yet be visible.

Point-of-use (POU) abatement treats exhaust gas at or near the individual process chamber, before streams from multiple tools are combined, whereas central abatement systems treat combined exhaust downstream from many chambers at once. The representative filing in this dataset, US20190351369A1, describes a compact POU device with isolated inlets so that each process chamber's gas stream is treated separately by its own oxidation device and scrubber column, avoiding cross-contamination between chambers. This isolation is the key technical distinction examiners and competitors look for when comparing POU claims against prior central-abatement art.

This dataset combines F04C25 (rotary vacuum pump mechanics), B01D53 (gas separation and purification processes) and H01L21 (semiconductor device processing) to scope the search, and B01D accounts for 72.7% of the 11 records returned, making it the dominant class. A thorough prior-art search should also check G05B for abatement control-system claims and H10P-classified subject matter, both of which appear in over a third of this record set despite the search being centred on separation and pumping terms.