US2892140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current switching device for electromagnetic hammers
Assignee: MAXIM ELECTRONIES Ltd
•
Filing: 1956-08-30
•
Granted: 1959-06-23
•
Expires: 1976-08-30
Abstract
No abstract record available.
Inventors
- 👤 Walter F Praeg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:33
CPC Classifications
H; H02; H02K; H02K33/00; H02K33/12; H02K33/14; B; B25; B25D; B25D11/00; B25D11/06; B25D11/064
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2285434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-22 | 1962-12-22 | 1963-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-22 | 1966-12-22 | 1967-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-22 | 1970-12-22 | 1971-06-23 | $7700.00 | Window Closed / Lapsed |