Resin extraction process
Abstract
Abstract A CONTINUOUS PROCESS FOR THE EXTRACTION FROM RESINCONTAINING COAL, OF SUBSTANTIALLY ALL OF THE CONTAINED RESIN. THE PROCESS PROVIDES FOR SUBJECTING RESIN-CONTAINING COAL FINES TO A INTEGRATED SOLVENT-EXTRACTION AND SOLUTION-SEPARATION PROCEDURE FOR OBTAINING BOTH A FIRST QUANITY OF RESIN SOLUTION CONTAINING A MAJOR PORTION OF THE RESIN, AND A MIXTURE OF COAL FINES AND SOLUTION CONTAINING SUBSTANTIALLY ALL OF THE REMAINING PORTION OF THE RESIN; SUBJECTING THE MIXTURE TO A SERIES OF INTEGRATED SOLVENT-DILUTION AND SOLUTION-SEPARATION PROCEDURES FOR OBTAINING BOTH A SECOND OF RESIN SOLUTION CONTAINING SUBSTANTIALLY ALL OF THE REMAINING PORTION OF THE RESIN AND A RESIDUAL MIXTURE OF COAL FINES AND SOLVENT, RECOVERING SUBSTANTIALLY ALL OF THE RESIN CONTAINED IN THE FIRST AND SECOND QUANTIES OF SOLUTION; AND RECOVERING SUBSTANTIALLY ALL OF THE SOLVENT EMPLOYED.
Inventors
- 👤 Francis R Zinniel
- 👤 Eugene R Blome
- 👤 Philip D Kimball
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |