Patent US2484471A successfully refreshed from Google Patents.
US2484471A
Expired / Lapsed
US
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Hammer drill
Assignee: Individual
•
Filing: 1947-12-26
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Granted: 1949-10-11
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Expires: 1967-12-26
Abstract
No abstract record available.
Inventors
- 👤 Charles A Shinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:38
CPC Classifications
B; B25; B25D; B25D11/00; B25D11/06; B25D11/10; B25D11/102; B25D11/106; B25D2211/00; B25D2211/06; B25D2211/062; B25D2211/067; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18024; Y10T74/18056; Y10T74/18296; Y10T74/18304
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) | 1952-10-10 | 1953-04-11 | 1953-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-10 | 1957-04-11 | 1957-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-10 | 1961-04-11 | 1961-10-11 | $7700.00 | Window Closed / Lapsed |