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| Number | Title | Issue Date |
| 6172275 | Method and apparatus for pyrolytically decomposing waste plastic Disclosed is a method and apparatus for pyrolytically decomposing waste plastic which may contain halogen-containing polymer such as PVC. The plastic is heated at 270° to 350° C., whereby a plasticizer contained in the plastic material is decomposed and... | 01/09/2001 |
| 5608136 | Method and apparatus for pyrolytically decomposing waste plastic Disclosed is a method and an apparatus for pyrolytically decomposing waste plastic, e.g. PVC, to recover light fuel oil. The invention enables to prevent the product from contamination by halogen compounds. The plastic is first thermally decomposed in an ... | 03/04/1997 |
