On first pass reading the patent, it’s a somewhat interesting idea, though it’s not really a true solventless process. Technically the extraction portion is “solventless” but you’ve still got to dunk it in ethanol afterwards.
It looks like you basically heat up the biomass with a hot gas/air stream, then spray ethanol over the gas stream to pick up all of the terpenes and cannabinoids. You’ve still got cannabis oil and terpenes stuck in ethanol at the end of the process.
Not all that dissimilar in concept to bubbling the output from your volcano through some everclear to trap the good stuff.
I believe it could let you extract without worrying about chlorophylls and fats/waxes, which is a nice perk. The chlorophyll starts to break down around 300 f I believe.
The downside is it looks like hot gas extractions are not so great for yield - you only get about half to 80% of your cannabinoids.
Could you tune that and make it better? Probably, but my gut says the lost cannabinoids outweigh any other benefits if you’re operating at any kind of scale.
Pretty cool for the craft/hobbyist/prosumer level though.