Patent US2481578A successfully refreshed from Google Patents.
US2481578A
Expired / Lapsed
US
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Attachment for electric hand drills
Assignee: Individual
•
Filing: 1944-06-21
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Granted: 1949-09-13
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Expires: 1964-06-21
Abstract
No abstract record available.
Inventors
- 👤 Alfred B Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:36
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/14; B25B23/141; B25B21/00; F; F16; F16D; F16D7/00; F16D7/04; F16D7/042; F16D7/044; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19372
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |