Patent US3201943A successfully refreshed from Google Patents.
US3201943A
Expired / Lapsed
US
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Mine roof support
Assignee: Rheinstahl Wanheim GmbH
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Filing: 1961-11-27
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Granted: 1965-08-24
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Expires: 1981-11-27
Abstract
No abstract record available.
Inventors
- 👤 Wilkenloh Wilhelm
- 👤 Brauer Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:21
CPC Classifications
E; E21; E21D; E21D23/00; E21D23/04; E21D23/0418; E21D23/0047; E21D23/0052
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN A MULTI-PROP MINE ROOF SUPPORT, IN COMBINATION, AT LEAST TWO PROPS EACH HAVING A LOWER PORTION AND AN UPPER PORTION RECIPROCABLE RELATIVE TO SAID LOWER PORTION TO SUPPORT SAID ROOF; A GROUND CONTACTING SOLE PLATE FOR EACH PROP;MEANS FOR ARTICULATELY COUPLING THE GROUND CONTACTING SOLE PLATES WITH THE LOWER PORTIONS OF THE RESPECTIVE PROPS; A GORUND CONTACTING CONNECTING PLATE ARRANGED BETWEEN THE LOWER PORTIONS OF ADJACENT PROPS; AND COUPLING MEANS AT BOTH ENDAS OF SAID GROUND CONTACTING CONNECTING PLATE SLIDABLY ENGAGING SAID LOWER PORTIONS OF SAID ADJACENT PORPS FOR SLIDING MOVEMENT RELATIVE THERETO.
Claim 2
Dependent Claim
94 words
IN A MULTI-PROP MINE ROOF SUPPORT, IN COMBINATION, AT LEAST TWO PROPS EACH HAVING A LOWER PORTION AND AN UPPER PORTION RECIPROCABLE RELATIVE TO SAID LOWER PORTION TO SUPPORT SAID ROOF; A GROUND CONTACTING SOLE PLATE FOR EACH PROP;MEANS FOR ARTICULATELY COUPLING THE GROUND CONTACTING SOLE PLATES WITH THE LOWER PORTIONS OF THE RESPECTIVE PROPS; A GORUND CONTACTING CONNECTING PLATE ARRANGED BETWEEN THE LOWER PORTIONS OF ADJACENT PROPS; AND COUPLING MEANS AT BOTH ENDAS OF SAID GROUND CONTACTING CONNECTING PLATE SLIDABLY ENGAGING SAID LOWER PORTIONS OF SAID ADJACENT PORPS FOR SLIDING MOVEMENT RELATIVE THERETO.
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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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |