US3274933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for explosive charge drilling
Assignee: ExxonMobil Upstream Research Co
•
Filing: 1963-05-24
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Granted: 1966-09-27
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Expires: 1983-05-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Leon H Robinson
- 👤 Robert H Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:10
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
APPARATUS FOR USE IN THE EARTH DRILLING, COMPRISING: AN ELONGATED HOUSING; NONDIRECTIONAL FIRST EXPLOSIVE CHARGE MEANS AT THE LOWER END OF SAID HOUSING; A THIN CUP-SHAPED SUPPORTING MEMBER POSITIONED IN SAID HOUSING ABOVE SAID EXPLOSIVE CHARGE MEANS, EXTENDING OUTWARDLY FROM THE AXIS OF SAID HOUSING AND UPWARDLY AND AWAY FROM SAID EXPLOSIVE CHARGE MEANS; A SECOND EXPLOSIVE CHARGE MEANS LINING THE LINNER SURFACE OF SAID SUPPORTING MEMBER; FIRST DETONATING MEANS CONNECTED TO SAID FIRST EXPLOSIVE CHARGE MEANS; SECOND DETONATING MEANS CONNECTED TO SAID EXPLOSIVE CHARGE MEANS ADAPTED UPON ACTIVATION THEREOF TO DETONATE SAID SECOND EXPLOSIVE CHARGE MEANS A PREDETERMINED INTERVAL AFTER ACTIVATION OF SAID FIRST DETONATING MEANS AND BEFORE THE ENERGY PRODUCED BY DETONATION OF SAID FIRST EXPLOSIVE CHARGE MEANS REACHES SAID SECOND EXPLOSIVE CHANRGE MEANS; AND MEANS FOR SIMULTANROUSLY ACTIVATING SAID FIRST AND SECOND DETONATING MEANS.
Claim 2
Dependent Claim
137 words
APPARATUS FOR USE IN THE EARTH DRILLING, COMPRISING: AN ELONGATED HOUSING; NONDIRECTIONAL FIRST EXPLOSIVE CHARGE MEANS AT THE LOWER END OF SAID HOUSING; A THIN CUP-SHAPED SUPPORTING MEMBER POSITIONED IN SAID HOUSING ABOVE SAID EXPLOSIVE CHARGE MEANS, EXTENDING OUTWARDLY FROM THE AXIS OF SAID HOUSING AND UPWARDLY AND AWAY FROM SAID EXPLOSIVE CHARGE MEANS; A SECOND EXPLOSIVE CHARGE MEANS LINING THE LINNER SURFACE OF SAID SUPPORTING MEMBER; FIRST DETONATING MEANS CONNECTED TO SAID FIRST EXPLOSIVE CHARGE MEANS; SECOND DETONATING MEANS CONNECTED TO SAID EXPLOSIVE CHARGE MEANS ADAPTED UPON ACTIVATION THEREOF TO DETONATE SAID SECOND EXPLOSIVE CHARGE MEANS A PREDETERMINED INTERVAL AFTER ACTIVATION OF SAID FIRST DETONATING MEANS AND BEFORE THE ENERGY PRODUCED BY DETONATION OF SAID FIRST EXPLOSIVE CHARGE MEANS REACHES SAID SECOND EXPLOSIVE CHANRGE MEANS; AND MEANS FOR SIMULTANROUSLY ACTIVATING SAID FIRST AND SECOND DETONATING MEANS.
References Cited (Backward Citations)
US60573A
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US87372A
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US704465A
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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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |