US2760484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-blackout device
Assignee: Individual
•
Filing: 1944-08-26
•
Granted: 1956-08-28
•
Expires: 1964-08-26
Abstract
No abstract record available.
Inventors
- 👤 Ferwerda Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:53
CPC Classifications
B; B64; B64D; B64D10/00; B64D25/00; Y; Y10; Y10T; Y10T137/00; Y10T137/0753
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US235186A
Cited
US455913A
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US1268597A
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US1737588A
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US2222886A
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US2104758A
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US2228115A
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US2335474A
Cited
US2676586A
Cited
US2620791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |