Patent US2579438A successfully refreshed from Google Patents.
US2579438A
Expired / Lapsed
US
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Screw holding screw driver
Assignee: DE PUY MANUFACTURING COMPANY Inc
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Filing: 1946-02-15
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Granted: 1951-12-18
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Expires: 1966-02-15
Abstract
No abstract record available.
Inventors
- 👤 Earl E Longfellow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:48
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/02; B25B23/08; B25B23/10; B25B23/101; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17411; Y10T279/17418; Y10T279/17427
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US21864A
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US414619A
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US1531567A
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US1558225A
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US1687788A
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US1808660A
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US2214241A
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US2228685A
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US2302691A
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US2320611A
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US2370407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |