An apparatus for precision cleaning with carbon dioxide includes a pressure vessel having a removable cleaning drum with a sanitized work zone. The sanitized work zone is defined by an impermeable drum body having a removable exit filter to ensure that circulating cleaning fluid does not redeposit contaminants...http://www.google.fr/patents/US5526834?utm_source=gb-gplus-shareBrevet US5526834 - Apparatus for supercritical cleaning
