US2949909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic hammer
Assignee: Individual
•
Filing: 1958-05-19
•
Granted: 1960-08-23
•
Expires: 1978-05-19
Abstract
No abstract record available.
Inventors
- 👤 Macchioni Pietro Aurelio
- 👤 Macchioni Luigi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:55
CPC Classifications
B; B25; B25D; B25D11/00; B25D11/06; B25D11/064; B25D17/00; B25D17/20; B25D2217/00; B25D2217/0057; B25D2217/0061
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2380622A
Cited
US2399977A
Cited
US2436992A
Cited
GB614242A
Cited
US2439230A
Cited
US2641720A
Cited
GB741536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |