Patent US2604912A successfully refreshed from Google Patents.
US2604912A
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Screw driver
Assignee: AT&T Inc
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Filing: 1949-02-04
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Granted: 1952-07-29
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Expires: 1969-02-04
Abstract
No abstract record available.
Inventors
- 👤 Wallace A Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:31
CPC Classifications
F; F16; F16B; F16B23/00; F16B23/0007; F16B23/0015; B; B25; B25B; B25B15/00; B25B15/001; B25B15/004; B25B15/007; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17761; Y10T279/17821; Y10T279/17957
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1314012A
Cited
US847774A
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US1300275A
Cited
US1410088A
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US1501222A
Cited
US1797390A
Cited
US2329398A
Cited
US2522165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |