Patent US2583841A successfully refreshed from Google Patents.
US2583841A
Expired / Lapsed
US
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Apparatus for measuring rotary well strings and well depths
Assignee: Individual
•
Filing: 1948-03-02
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Granted: 1952-01-29
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Expires: 1968-03-02
Abstract
No abstract record available.
Inventors
- 👤 John T Hayward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:07
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1870362A
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US1802156A
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US1933877A
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US2166212A
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US2221767A
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US2326219A
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US2491711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |