US3563714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and compositions for packing coal
Assignee: Fluid Density Inc
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Filing: 1969-01-02
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Granted: 1971-02-16
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Expires: 1989-01-02
Abstract
Abstract A METHOD AND COMPOSITION ARE PROVIDED FOR TREATING COAL TO IMPROVE ITS PACKED BULK DENSITY BY MIXING LIGHT FUEL OIL DISTILLATE, WATER AND SUFFICIENT SURFACTANT TO EMULSIFYING THE OIL AND WATER, TREATING THE COAL WITH THE MIXTURE AND PACKING THE TREATED COAL INTO A DESIRED VESSEL.
Inventors
- 👤 Arthur G Brewer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:59
CPC Classifications
C; C10; C10B; C10B57/00; C10B57/04; C10B57/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |