Patent ID: 6945853
Filing Date: 2005-09-20
Classification: B08B,B24C,G02F,H01L

Abstract:
1. A process for cleaning an article utilizing a multi-stage filtered carbon dioxide-containing cleaning medium, comprising the steps of: providing a source of the carbon dioxide-containing cleaning medium, wherein the carbon dioxide-containing cleaning medium contains one or more contaminants including at least a hydrocarbon; providing a first mode filtration stage, wherein the first mode filtration stage provides condensation-based filtration and removes one or more contaminants from the carbon dioxide-containing cleaning medium; providing a second mode filtration stage, wherein the second mode filtration stage provides catalyst-based oxidation/reduction and removes one or more contaminants from the carbon dioxide-containing cleaning medium; providing a third mode filtration stage, wherein the third mode filtration stage provides carbon filter-based removal of one or more contaminants from the carbon dioxide-containing cleaning medium; providing the carbon dioxide-containing cleaning medium to one or more surfaces of the article, wherein the article is cleaned.