Patent US2670770A successfully refreshed from Google Patents.
US2670770A
Expired / Lapsed
US
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Screw holding and feeding means for power-operated screw drivers
Assignee: Allen B du Mont Laboratories Inc
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Filing: 1950-07-27
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Granted: 1954-03-02
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Expires: 1970-07-27
Abstract
No abstract record available.
Inventors
- 👤 Potterton William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:20
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/02; B25B23/04; B25B23/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1726693A
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US950534A
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US1231792A
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US1839490A
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US1945741A
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US2261134A
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US2314760A
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US2554732A
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US2517113A
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US2534140A
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US2544165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |