US Patent 8241371 Method of creating crystalline substances

Process for preparing a cocrystal of an active substance and a cocrystal former, the process involving precipitating the active substance and the cocrystal former together from solution or suspension, in the presence of a supercritical or near-critical fluid, in particular using a GAS, SAS, SEDS or SAS-EM process. The invention also provides a cocrystal prepared using such a process, and its use as a seed crystal in a subsequent process for precipitating a cocrystal of an active substance and a cocrystal former.