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| Number | Title | Issue Date |
| 7338981 | Separation of contaminants from polyester materials The present invention is generally directed to a process for separating and recovering post-consumer polyester from various contaminant materials. The invention can be utilized to separate post-consumer polyester from various contaminants including glass, dirt, pape... | 03/04/2008 |
| 7098299 | Separation of contaminants from polyester materials The present invention is generally directed to a process for separating and recovering post-consumer polyester from various contaminant materials. The invention can be utilized to separate post-consumer polyester from various contaminants including glass, dirt, pape... | 08/29/2006 |
| 7097044 | Dry separation of contaminants from polyester materials A method for separating polyester materials from contaminants is disclosed suitable for, for example, a polyester recycling system. The method is a dry separation method and includes rapidly spinning a mixture of polyester and contaminants within a cleaning chamber.... | 08/29/2006 |
| 7070624 | Process for separating polyester from other materials The present invention is directed to a process for separating polyester, and particularly polyethylene terephthalate, from various contaminants and impurities. In general, the process includes the steps of mixing materials containing polyester with an alkaline compo... | 07/04/2006 |
| 5641452 | Device for recovering silver from fluids and process using same A silver recovery device for recovering silver from silver containing fluids is provided. The silver recovery device includes an outside container having a fluid inlet and a fluid outlet. A silver recovery cartridge, positioned within the outside containe... | 06/24/1997 |
| 5580905 | Process for recycling polyesters A process for recycling polyester contained in waste materials is provided. The polyester is converted into a corresponding acid salt of a polybasic organic acid and a polyol. The process steps generally include first combining materials containing polyes... | 12/03/1996 |
