Patent US3421858A successfully refreshed from Google Patents.
US2512232A
Expired / Lapsed
US
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Reversible ratchet screw driver
Assignee: Individual
•
Filing: 1947-01-17
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Granted: 1950-06-20
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Expires: 1967-01-17
Abstract
No abstract record available.
Inventors
- 👤 Ivan T Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:03
CPC Classifications
B; B25; B25B; B25B15/00; B25B15/02; B25B15/04; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2133; Y10T74/2136; Y10T74/214
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US176811A
Cited
US277561A
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US683167A
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US1412718A
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US1635102A
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US1991766A
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US2103556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-19 | 1953-12-19 | 1954-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-19 | 1957-12-19 | 1958-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-19 | 1961-12-19 | 1962-06-20 | $7700.00 | Window Closed / Lapsed |