Liquid/supercritical carbon dioxide dry cleaning system
Patent 5267455 Issued on December 7, 1993. Estimated Expiration Date: 
July 13, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 13, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesProcess for the separation of mixtures of substances Extraction and cleaning processes Carbonated cleaning solution Cleaning process using phase shifting of dense phase gases Method and apparatus for dry cleaning as well as method and device for recovery of solvent therein Patent #: 5123176 Inventors
AssigneeApplicationNo. 912932 filed on 07/13/1992US Classes:68/5C, In chamber34/72, With means to treat gas or vapor68/18C, Using condenser68/18F, Using filter68/18RWith solvent recoveryExaminersPrimary: Coe, Philip R.Attorney, Agent or FirmForeign Patent References
International ClassesD06F 043/02D06F 043/08 AbstractA dry cleaning system particularly suited for employing supercritical CO2 as the cleaning fluid consisting of a sealable cleaning vessel containing a rotatable drum adapted for holding soiled substrate, a cleaning fluid storage vessel, and a gas vaporizer vessel for recycling used cleaning fluid is provided. The drum is magnetically coupled to a motor so that it an be rotated during the cleaning process. The system is adapted for automation which permits increased energy efficiency as the heating and cooling effect associated with CO2 gas condensation and expansion can be channeled to heat and cool various parts of the system.Other References
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