US2871784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Firing system for electrically detonated borehole equipment
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1951-07-05
•
Granted: 1959-02-03
•
Expires: 1971-07-05
Abstract
No abstract record available.
Inventors
- 👤 Winton B Blair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:14
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/04; F42D1/045; F42D1/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2736260A
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US2062974A
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FR757734A
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US2055506A
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US2276544A
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US2307729A
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US2264450A
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US2369238A
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US2363234A
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US2331058A
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FR985093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |