Patent US3091935A successfully refreshed from Google Patents.
US3091935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock treatment
Assignee: Wyeth Holdings LLC
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Filing: 1957-08-13
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Granted: 1963-06-04
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Expires: 1977-08-13
Abstract
No abstract record available.
Inventors
- 👤 Brown Frank
- 👤 John H Prichard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:42
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/001; E21D9/002
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
131 words
A METHOD OF STABILIZING UNDERGROUND ROCK FORMATIONS WHICH FORM MINE ROOFS WHICH COMPRISES: DRILLING A HOLE INTO A ROCK FORMATION HAVING ZONES OF WEAKNESS AND WHICH IS SUBJECT TO FAILURE IN TENSION AS WELL AS SHEAR, INJECTING UNDER PRESSURE INTO SAID HOLE AND THROUGH SAID HOLE INTO THE ROCK FORMATION A FORMATION ADHESIVE RESIN WHICH IS LIQUID AND SELF-CURING AT AMBIENT TEMPERATURES, AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF SOLUTIONS OF LINEAR POLYESTERS IN LIQUID MONOMERIC UNSATURATED POLYMERIZABLE COMPOUNDS CONTAINING AN ALPHA-BETA ETHYLENIC LINKAGE, SAID SOLUTIONS ALSO CONTAINING A PEROXIDE TYPE CATALYST AND A COBALT PROMOTER, WHEREBY SAID RESIN FLOWS INTO AND FILLS SAID ZONES OF WEAKNESS AND CURES IN POSITION, THEREBY ADHESIVELY UNITING SAID FORMATION AT THE ZONES OF WEAKNESS, AND STABILIZING SAID ROCK FORMATION AGAINST ROOF FALLS.
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) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |