I saw some extract that Dr Bob Melamede had when he was here in Australia. In fact, I tried it several times! Seriously. The extract was given to Dr Bob by a colleague who had made it under a new patent for a closed cycle, super critical fluid extraction, using pure butane.
Also, while Dr Bob and I visited with Mullaway Man (an indigenous healer) and tried some of his extract. Both were excellent I must say.
The extract that CBIS makes will no doubt be very high in CBD as well as THC. A 1:1 ratio being ideal. They have the strains to achieve this.