US3333896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for rock dusting during coal mining operations
Assignee: CARBON FUEL Co
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Filing: 1965-04-29
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Granted: 1967-08-01
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Expires: 1985-04-29
Abstract
No abstract record available.
Inventors
- 👤 James J Diamanti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:14
CPC Classifications
E; E21; E21F; E21F5/00; E21F5/08; E21F5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A METHOD OF SAFETY MINING COAL BY USE OF MECHANICAL MINING EQUIPMENT, WHEREIN A CURRENT OF VENTILATING AIR IS BLOWN AGAINST THE WORKING FACE OF THE COAL SEAM TO PICK-UP AND REMOVE COAL DUST CAUSED BY CUTTING ACTION OF SAID EQUIPMENT ON THE WORKING FACE AND IS REMOVED BY A DUCT WHOSE INTAKE IS LOCATED ADJACENT OF SAID FACE, COMPRISING BLOWING A GASEOUS SUSPENSION OF ROCK DUST INTO SAID CURRENT OF AIR BETWEEN SAID FACE AND SAID INTAKE OF THE DUCT DURING OPERATION OF SAID EQUIPMENT.
Claim 2
Independent Claim
86 words
A METHOD OF SAFETY MINING COAL BY USE OF MECHANICAL MINING EQUIPMENT, WHEREIN A CURRENT OF VENTILATING AIR IS BLOWN AGAINST THE WORKING FACE OF THE COAL SEAM TO PICK-UP AND REMOVE COAL DUST CAUSED BY CUTTING ACTION OF SAID EQUIPMENT ON THE WORKING FACE AND IS REMOVED BY A DUCT WHOSE INTAKE IS LOCATED ADJACENT OF SAID FACE, COMPRISING BLOWING A GASEOUS SUSPENSION OF ROCK DUST INTO SAID CURRENT OF AIR BETWEEN SAID FACE AND SAID INTAKE OF THE DUCT DURING OPERATION OF SAID EQUIPMENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |