Patent ID: 7125453

Claim:
An apparatus, comprising: a deformable capsule that comprises a closed end structure, a wall, and a sealable end structure, and which defines a chamber configured to receive a material and a solvent, wherein the wall adjoins the closed end and extends therefrom, and the sealable end structure adjoins the wall opposite the closed end structure, and the solvent is capable of becoming supercritical at a predetermined temperature to provide a predetermined pressure in the chamber, and the predetermined pressure is greater than about 5 kbar and is sufficient to deform the capsule, wherein the sealable end structure is operable to seal the chamber such that the capsule is impermeable to supercritical solvent at the predetermined temperature and predetermined pressure; and a zero-stroke pressure device configured to receive the capsule and operable to counterbalance the predetermined pressure generated within the chamber by the supercritical solvent at the predetermined temperature.