US3121389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaped explosive charge apparatus
Assignee: Services Petroliers Schlumberger SA
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Filing: 1957-12-24
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Granted: 1964-02-18
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Expires: 1977-12-24
Abstract
No abstract record available.
Inventors
- 👤 Delacour Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:09
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/28; E; E21; E21B; E21B43/00; E21B43/11; E21B43/116; E21B43/117
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A SHAPED EXPLOSIVE CHARGE DEVICE FOR USE IN PERFORATING APPARTUS AND THE LIKE, COMPRISING A SHAPED EXPLOSIVE CHARGE HAVING A HOLLOW-OUT DEPRESSION AT ONE END A LINER FOR SAID CHARGE DISPOSED IN SAID DEPRESSION, A CASING HAVING A SUBNSTANTIAL THICKNESS WHICH IS CONSIDERABLY GREATER THAN THAT OF THE LINER AND SUFFICIENT TO EFFECTIVELY CONFINE THE CHARGE WHEN DETONATED, SAID CASING COMPLETELY SURROUNDING THE PORTION OF THE SURFACE OF SAID CASING BEING MADE OF COMPRESSED AND SINTERED METAL POWDER AND AN OUTER COVER OF SHEET MATERIAL IN CLOSE FITTING CONTACT WITH AT LEAST A SUBSTANTIAL PORTION OF SAID CASING, SAID SHEET MATERIAL BEING VERY THIN RELATIVE TO THE THICKNES OF SAID CASING .
Claim 2
Dependent Claim
112 words
A SHAPED EXPLOSIVE CHARGE DEVICE FOR USE IN PERFORATING APPARTUS AND THE LIKE, COMPRISING A SHAPED EXPLOSIVE CHARGE HAVING A HOLLOW-OUT DEPRESSION AT ONE END A LINER FOR SAID CHARGE DISPOSED IN SAID DEPRESSION, A CASING HAVING A SUBNSTANTIAL THICKNESS WHICH IS CONSIDERABLY GREATER THAN THAT OF THE LINER AND SUFFICIENT TO EFFECTIVELY CONFINE THE CHARGE WHEN DETONATED, SAID CASING COMPLETELY SURROUNDING THE PORTION OF THE SURFACE OF SAID CASING BEING MADE OF COMPRESSED AND SINTERED METAL POWDER AND AN OUTER COVER OF SHEET MATERIAL IN CLOSE FITTING CONTACT WITH AT LEAST A SUBSTANTIAL PORTION OF SAID CASING, SAID SHEET MATERIAL BEING VERY THIN RELATIVE TO THE THICKNES OF SAID CASING .
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |