Patent US2607222A successfully refreshed from Google Patents.
US2607222A
Expired / Lapsed
US
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Formation tester
Assignee: Individual
•
Filing: 1946-05-28
•
Granted: 1952-08-19
•
Expires: 1966-05-28
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Lane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:47
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1963011A
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US2085972A
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US2198821A
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US2262655A
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US2297020A
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US2313176A
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US2334920A
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US2309697A
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US2289687A
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US2332567A
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US2377501A
Cited
US2426393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |