US3288532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous mining machine and method
Assignee: Union Oil Company of California
•
Filing: 1964-03-10
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Granted: 1966-11-29
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Expires: 1984-03-10
Abstract
No abstract record available.
Inventors
- 👤 Harold E Carver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:05
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/10; E21D9/11; E21D9/112; E21C; E21C27/00; E21C27/20; E21C27/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD OF CONTINUOUS MINING IN A SUBTERRANEAN FORMATION COMPRISING: FORMING A SUBSTANTIALLY CONCAVE CONICAL FACE HAVING ITS VERTEX ADJACENT THE POINT OF DEEPEST PENETRATION INTO SAID FORMATION, SAID FACE COMPRISING A SERIES OF ANNULAR STEPS ABOUT ITS PERIPHERY WHICH INCREASE IN DIAMETER FROM SAID VERTEX REARWARD, EACH OF SAID STEPS BEING FORMED BY A RADIAL FACE NORMAL TO THE DIRECTION OF PENETRATION AND AN AXIAL FACE PARALLEL TO THE DIRECTION OF PENETRATION; CUTTING PERIPHERAL GROOVES INTO SAID FORMATION ADJACENT THE INTERIOR ANGLES FORMED AT THE JUNCTURE OF SAID
Claim 2
Independent Claim
89 words
A METHOD OF CONTINUOUS MINING IN A SUBTERRANEAN FORMATION COMPRISING: FORMING A SUBSTANTIALLY CONCAVE CONICAL FACE HAVING ITS VERTEX ADJACENT THE POINT OF DEEPEST PENETRATION INTO SAID FORMATION, SAID FACE COMPRISING A SERIES OF ANNULAR STEPS ABOUT ITS PERIPHERY WHICH INCREASE IN DIAMETER FROM SAID VERTEX REARWARD, EACH OF SAID STEPS BEING FORMED BY A RADIAL FACE NORMAL TO THE DIRECTION OF PENETRATION AND AN AXIAL FACE PARALLEL TO THE DIRECTION OF PENETRATION; CUTTING PERIPHERAL GROOVES INTO SAID FORMATION ADJACENT THE INTERIOR ANGLES FORMED AT THE JUNCTURE OF SAID
References Cited (Backward Citations)
GB135179A
Cited
DE253799C
Cited
US1488066A
Cited
US1888085A
Cited
US2161000A
Cited
US2901231A
Cited
US3092190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |