US3422673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for soft sand testing
Assignee: Schlumberger Technology Corp
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Filing: 1966-06-09
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Granted: 1969-01-21
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Expires: 1986-06-09
Abstract
No abstract record available.
Inventors
- 👤 Maurice P Lebourg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:55
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/087; E21B33/00; E21B33/10; E21B33/12; E21B33/127; E21B47/00; E21B47/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |