US3111306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of mining trona using a continuous miner
Assignee: FMC Corp
•
Filing: 1960-05-25
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Granted: 1963-11-19
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Expires: 1980-05-25
Abstract
No abstract record available.
Inventors
- 👤 Robert F Love
- 👤 William Z Wenneborg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:47
CPC Classifications
E; E21; E21C; E21C41/00; E21C41/16; E21C41/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
THE METHOD OF MINING TRONA BY THE USE OF A CONTINUOUS MINER, WHICH COMPRISES DRIVING A SERIES OF SUBSTANTIALLY PARALLEL ENTRIES INTO THE TRONA BED, DRIVING A SERIES OF SUBSTANTIALLY PARALLEL ROOMS AT ANGLES TO THE ENTRIES TO DIVIDE THE AREA TO BE MINED INTO TIERS OF PILLARS AND DRIVING LIFTS IN A SUBSTANTIALLY STRAIGHT LINE THROUGH A TIER OF PILLARS, TURNING THE MINING MACHINE AND DRIVING LIFTS IN A SUBSTANTIALLY STRAIGHT LINE IN THE OPPOSITE DIRECTION THROUGH SAID TIER OF PILLARS UNTIL EACH SUCCESSIVE TIER OF PILLARS IS EXTRACTED LEAVING A NARROW FENDER OF TRONA BETWEEN EACH LIFT AND THE PREVIOUSLY MINED AREA AND WHEN A LIFT THROUGH THE NEXT PILLAR OF A SERIES OF PILLARS HAS BEEN COMPLETED, CAVING THE FENDER AND THE ROOF OF SAID PREVIOUSLY MINED LIFT.
Claim 2
Independent Claim
131 words
THE METHOD OF MINING TRONA BY THE USE OF A CONTINUOUS MINER, WHICH COMPRISES DRIVING A SERIES OF SUBSTANTIALLY PARALLEL ENTRIES INTO THE TRONA BED, DRIVING A SERIES OF SUBSTANTIALLY PARALLEL ROOMS AT ANGLES TO THE ENTRIES TO DIVIDE THE AREA TO BE MINED INTO TIERS OF PILLARS AND DRIVING LIFTS IN A SUBSTANTIALLY STRAIGHT LINE THROUGH A TIER OF PILLARS, TURNING THE MINING MACHINE AND DRIVING LIFTS IN A SUBSTANTIALLY STRAIGHT LINE IN THE OPPOSITE DIRECTION THROUGH SAID TIER OF PILLARS UNTIL EACH SUCCESSIVE TIER OF PILLARS IS EXTRACTED LEAVING A NARROW FENDER OF TRONA BETWEEN EACH LIFT AND THE PREVIOUSLY MINED AREA AND WHEN A LIFT THROUGH THE NEXT PILLAR OF A SERIES OF PILLARS HAS BEEN COMPLETED, CAVING THE FENDER AND THE ROOF OF SAID PREVIOUSLY MINED LIFT.
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) | 1966-11-18 | 1967-05-20 | 1967-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-18 | 1971-05-20 | 1971-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-18 | 1975-05-20 | 1975-11-19 | $7700.00 | Window Closed / Lapsed |