exergen due diligence, page-3

This is another interesting link showing early designs for the autoclaves as invented by Peter Tait. It would be interesting to see what's changed design wise after 10 years of tweaking by some of the big mining tech players -

http://www.sumobrain.com/patents/wipo/High-pressure-extraction/WO2002098553A1.pdf

I wonder if this is the world wide patent Exergen currently hold or an earlier version of it.

Also interesting that Exergen are able to simulate the process at their Melbourne bench scale pilot and also test a working autoclave at their pilot plant in Tassie where their autoclave runs in an air ventilation shaft at one of the mines there.

I wonder is it the same mine where the guys were trapped and then rescued from around 1km below the surface?

cheers
B Rubes