Patent US2993723A successfully refreshed from Google Patents.
US2993723A
Expired / Lapsed
US
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Magnetic retrievers
Assignee: Individual
•
Filing: 1959-11-04
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Granted: 1961-07-25
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Expires: 1979-11-04
Abstract
No abstract record available.
Inventors
- 👤 Twachtman Godfrey
- 👤 Ware John Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:49
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0231; H01F7/0252; H01F7/0257; B; B03; B03C; B03C1/00; B03C1/02; B03C1/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1347382A
Cited
US1521173A
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US1558447A
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US1680599A
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US1772126A
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US2269458A
Cited
US2372930A
Cited
US2428864A
Cited
US2683618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |