US3307361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of constructing an underground structure
Assignee: Halliburton Co
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Filing: 1965-09-01
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Granted: 1967-03-07
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Expires: 1985-09-01
Abstract
No abstract record available.
Inventors
- 👤 Willis D Waterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:55
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/14; E02; E02D; E02D27/00; E02D27/32; E02D27/38; E02D29/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE METHOD OF CONSTRUCTING AN UNDERGROUND STRUCTURE OF THE TYPE DESCRIBED, COMPRISING THE STEPS OF: FORMING AN UPRIGHT SHAFT IN THE EARTH, MAINTAINING LIQUID IN SAID SHAFT, FLOATING A DOUBLE-WALL MEMBER AXIALLY OF THE SHAFT, THE LOWER END OF THE INNER WALL BEING CLOSED TO PERMIT FLOATING OF THE MEMBER DOWNWARD IN THE LIQUID UNTIL THE LOWER PORTION OF THE MEMBER IS POSITIONED NEAR THE BOTTOM OF THE SHAFT, AND INTRODUCING CEMENTITIOUS MATERIAL TO FILL THE SPACE BETWEEN THE LOWER END OF THE MEMBER AND THE SHAFT, AND TO FILL THE SPACE BETWEEN THE INNER WALL AND THE OUTER WALL.
Claim 2
Independent Claim
100 words
THE METHOD OF CONSTRUCTING AN UNDERGROUND STRUCTURE OF THE TYPE DESCRIBED, COMPRISING THE STEPS OF: FORMING AN UPRIGHT SHAFT IN THE EARTH, MAINTAINING LIQUID IN SAID SHAFT, FLOATING A DOUBLE-WALL MEMBER AXIALLY OF THE SHAFT, THE LOWER END OF THE INNER WALL BEING CLOSED TO PERMIT FLOATING OF THE MEMBER DOWNWARD IN THE LIQUID UNTIL THE LOWER PORTION OF THE MEMBER IS POSITIONED NEAR THE BOTTOM OF THE SHAFT, AND INTRODUCING CEMENTITIOUS MATERIAL TO FILL THE SPACE BETWEEN THE LOWER END OF THE MEMBER AND THE SHAFT, AND TO FILL THE SPACE BETWEEN THE INNER WALL AND THE OUTER WALL.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |