Patent US2830664A successfully refreshed from Google Patents.
US2830664A
Expired / Lapsed
US
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Permanent magnet fishing tool
Assignee: Individual
•
Filing: 1957-02-25
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Granted: 1958-04-15
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Expires: 1977-02-25
Abstract
No abstract record available.
Inventors
- 👤 Ii John H Kirby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:26
CPC Classifications
E; E21; E21B; E21B31/00; E21B31/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2493992A
Cited
US2431361A
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US2556849A
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US2582602A
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US2522294A
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US2613980A
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US2696260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |