Patent US3056439A successfully refreshed from Google Patents.
US3056439A
Expired / Lapsed
US
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Adapter for connecting power drills to powerless tools
Assignee: Skil Corp
•
Filing: 1959-11-27
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Granted: 1962-10-02
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Expires: 1979-11-27
Abstract
No abstract record available.
Inventors
- 👤 Emery L Hall
- 👤 Richard H Kocian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:27
CPC Classifications
B; B23; B23B; B23B45/00; B23B45/003; B23D; B23D45/00; B23D45/16; B23D57/00; B23D57/0076; B25; B25F; B25F3/00; B27; B27C; B27C9/00; B27C9/005; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32975; Y10T408/00; Y10T408/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1785065A
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US1899883A
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US2539003A
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US2531849A
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US2726689A
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US2822559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-01 | 1966-04-02 | 1966-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-01 | 1970-04-02 | 1970-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-01 | 1974-04-02 | 1974-10-02 | $7700.00 | Window Closed / Lapsed |