Patent US2950759A successfully refreshed from Google Patents.
US2950759A
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Method and apparatus for sampling well fluids
Assignee: AIRCUSHION PATENTS Corp
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Filing: 1958-03-13
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Granted: 1960-08-30
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Expires: 1978-03-13
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:14
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2214551A
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US2033563A
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US2137296A
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US2176240A
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US2203577A
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US2661802A
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US2830667A
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US2850097A
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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) | 1963-08-30 | 1964-02-29 | 1964-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-30 | 1968-02-29 | 1968-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-30 | 1972-02-29 | 1972-08-30 | $7700.00 | Window Closed / Lapsed |