http://www.osti.gov/energycitations/servlets/purl/10116157-47l13r/native/
As odd - but by now unsurprisingly - as it might seem, it was the USDOE's Sandia National Lab, all the way out in New Mexico, that was able to liquefy Coal, at a rate in excess of 95% - by starting with a crude Coal distillate supplied to them by our own, local, Consolidation Coal Company.
That fact would seem confirmed by one statement in this Sandia report, acknowledging "Consol Inc. for providing the dewaxed heavy distillate".
Consol has only a minor presence west of the Mississippi River - one mine, according to web-based resources, in Utah.
Furthermore, the Coal raw materials received by Sandia, from Consol, had already, to a certain extent, been processed.