Patent US2565948A successfully refreshed from Google Patents.
US2565948A
Expired / Lapsed
US
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Method of manufacturing screw drivers
Assignee: Phillips Screw Co
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Filing: 1946-08-06
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Granted: 1951-08-28
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Expires: 1966-08-06
Abstract
No abstract record available.
Inventors
- 👤 Cecil M Cambern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:15
CPC Classifications
B; B21; B21K; B21K5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US229485A
Cited
US961184A
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US1491230A
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US2046840A
Cited
FR46617E
Cited
US2066372A
Cited
US2116775A
Cited
US2159842A
Cited
US2297983A
Cited
US2366682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |