Patent US2319834A successfully refreshed from Google Patents.
US3130495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surveying of underground tunnels and chambers
Assignee: Rheinpreussen AG fuer Bergbau und Chemie
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Filing: 1957-10-23
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Granted: 1964-04-28
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Expires: 1977-10-23
Abstract
No abstract record available.
Inventors
- 👤 Schulte Heinrich Friedrich
- 👤 Rhine Lower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:06
CPC Classifications
G; G01; G01C; G01C15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN THE SURVEYING OF UNDERGROUND TUNNELS AND CHAMBERS USING AN UNDERGROUND POINT IN SITU IN AN UNOBSTRUCTED VERTICAL SHAFT AS REFERENCE POINT RELATIVE TO A PREDETERMINED POSITION VERTICALLY DIRECTLY THEREABOVE, THE IMPROVEMENT FOR ESTABLISHING THE UNDERGROUND POINT VERTICALLY DIRECTLY BELOW THE PREDETERMINED POSITION VERTICALLY DIRECTLY THEREABOVE AT A REMOTE DISTANCE THEREFROM WHICH COMPRISES FIRING A PROJECTILE VERTICALLY DIRECTLY DOWNWARDLY FROM THE PREDETERMINED POSITION THEREABOVE INTO A TARGET POSITIONED AT THE LEVEL AT WHICH THE UNDERGROUND POINT IS TO BE ESTABLISHED AT SAID REMOTE DISTANCE TO FORM A PUNCTURE POINT IN THE TARGET WHEREBY SAID PUNCTURE POINT MAY BE USED IN SITU UNDERGROUND AS THE UNDERGROUND POINT FOR SURVEYING.
Claim 2
Dependent Claim
108 words
IN THE SURVEYING OF UNDERGROUND TUNNELS AND CHAMBERS USING AN UNDERGROUND POINT IN SITU IN AN UNOBSTRUCTED VERTICAL SHAFT AS REFERENCE POINT RELATIVE TO A PREDETERMINED POSITION VERTICALLY DIRECTLY THEREABOVE, THE IMPROVEMENT FOR ESTABLISHING THE UNDERGROUND POINT VERTICALLY DIRECTLY BELOW THE PREDETERMINED POSITION VERTICALLY DIRECTLY THEREABOVE AT A REMOTE DISTANCE THEREFROM WHICH COMPRISES FIRING A PROJECTILE VERTICALLY DIRECTLY DOWNWARDLY FROM THE PREDETERMINED POSITION THEREABOVE INTO A TARGET POSITIONED AT THE LEVEL AT WHICH THE UNDERGROUND POINT IS TO BE ESTABLISHED AT SAID REMOTE DISTANCE TO FORM A PUNCTURE POINT IN THE TARGET WHEREBY SAID PUNCTURE POINT MAY BE USED IN SITU UNDERGROUND AS THE UNDERGROUND POINT FOR SURVEYING.
References Cited (Backward Citations)
USRE22719E
Cited
US2003345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |