A cryogenic cleaner for and a method of performing cleaning of a surface that must be substantially free of contaminants utilizing a multi-stage, multi-mode filtered carbon dioxide-containing cleaning medium. Multiple stages and multiple types of filtration/purification are provided to remove contaminants...http://www.google.fr/patents/US6945853?utm_source=gb-gplus-shareBrevet US6945853 - Methods for cleaning utilizing multi-stage filtered carbon dioxide
Methods for cleaning utilizing multi-stage filtered carbon dioxide
