US3260053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilizing mine roofs
Assignee: Dayton T Brown Inc
•
Filing: 1962-10-30
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Granted: 1966-07-12
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Expires: 1982-10-30
Abstract
No abstract record available.
Inventors
- 👤 Roy G Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:12
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
METHOD FOR STABILIZING A MINE FORMATION CONTAINING VOIDS AND CRACKS, WHICH COMPRISES INJECTING A HARDENABLE BINDER MATERIAL COMPONENT UNDER PRESSURE INTO A BORE HOLE COMMUNICATING WITH SAID VOIDS AND CRACKS WHILE SIMULTANEOUSLY SEPARATELY INJECTING INTO SAID BORE HOLE UNDER PRESSURE A CATALYST COMPONENT PROMOTING THE HARDENING OF SAID BINDER MATERIAL COMPONENT, ONE OF SAID COMPONENTS BEING INJECTED IN ANNULAR FLOW INTO THE BORE HOLE AND THE OTHER OF SAID COMPONENTS BEING INJECTED IN RADIALLY OUTWARDLY FLOW INTO SUCH ANNULAR FLOW FOR SAID SEPARATE SIMULTANEOUS INJECTION OF BOTH THE BINDER MATERIAL COMPONENT AND THE CATALYST COMPONENT INTO SAID BORE HOLE, BORE HOLE ALONG THEIR COMMON PATH AND CONDUCTING THE INTERMIXED BINDER MATERIAL AND CATALYST COMPONENTS ALONG
Claim 2
Dependent Claim
115 words
METHOD FOR STABILIZING A MINE FORMATION CONTAINING VOIDS AND CRACKS, WHICH COMPRISES INJECTING A HARDENABLE BINDER MATERIAL COMPONENT UNDER PRESSURE INTO A BORE HOLE COMMUNICATING WITH SAID VOIDS AND CRACKS WHILE SIMULTANEOUSLY SEPARATELY INJECTING INTO SAID BORE HOLE UNDER PRESSURE A CATALYST COMPONENT PROMOTING THE HARDENING OF SAID BINDER MATERIAL COMPONENT, ONE OF SAID COMPONENTS BEING INJECTED IN ANNULAR FLOW INTO THE BORE HOLE AND THE OTHER OF SAID COMPONENTS BEING INJECTED IN RADIALLY OUTWARDLY FLOW INTO SUCH ANNULAR FLOW FOR SAID SEPARATE SIMULTANEOUS INJECTION OF BOTH THE BINDER MATERIAL COMPONENT AND THE CATALYST COMPONENT INTO SAID BORE HOLE, BORE HOLE ALONG THEIR COMMON PATH AND CONDUCTING THE INTERMIXED BINDER MATERIAL AND CATALYST COMPONENTS ALONG
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |