US2678804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sample taking projectile
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1950-01-12
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Granted: 1954-05-18
•
Expires: 1970-01-12
Abstract
No abstract record available.
Inventors
- 👤 Maurice P Lebourg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:41
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/02; E21B49/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US424442A
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US1892158A
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US2044648A
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US2288210A
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US2281870A
Cited
US2441894A
Cited
US2410435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |