Patent US935429A successfully refreshed from Google Patents.
Patent US3147807A successfully refreshed from Google Patents.
US3147807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation tester
Assignee: Schlumberger Well Surveying Corp
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Filing: 1959-06-03
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Granted: 1964-09-08
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Expires: 1979-06-03
Abstract
No abstract record available.
Inventors
- 👤 Frank R Whitten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:08
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
IN A GUN BLOCK FOR USE WITH A FLUID SAMPLER, A GUN BORE, A SHAPED CHARGE MEANS DISPOSED IN SAID GUN BORE, A CLOSURE MEMBER RECEIVED IN ONE END OF SAID BORE AND HAVING A RELATIVELY THIN-WALLED PORTION ALIGNED WITH THE AXIS OF THE PERFORATING JET WHEN THE SHAPED CHARGE MEANS IS DETNOTED, MEANS INTERMEDIATE SAID THIN-WALLED PORTION AND SAID SHAPED CHARGE MEANS FOR IMPEDING THE PASSAGE OF DEBRIS FROM SAID SHAPED CHARGE MEANS WHEN DETNOTED YET PERMITTING PASSAGE OF THE PERFORATING JET, SAID GUN BLOCK FURTHER HAVING A SAMPLE-RECEIVING PASSAGE OPENING INTO SAID GUN BORE INTERMEDIATE SAID THIN-WALLED PORTION AND SAID IMPENDING MEANS.
References Cited (Backward Citations)
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Cited
US2582719A
Cited
US2674313A
Cited
US2612346A
Cited
US2947250A
Cited
US2782715A
Cited
US2821256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |