US2654838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impulse circuit
Assignee: BBC Brown Boveri AG Germany
•
Filing: 1948-09-03
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Granted: 1953-10-06
•
Expires: 1968-09-03
Abstract
No abstract record available.
Inventors
- 👤 Wideroe Rolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:04
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/55; B; B23; B23K; B23K11/00; B23K11/24; B23K11/248; H03K3/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2088059A
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US2139432A
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US2199246A
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US2250170A
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US2496979A
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US2422575A
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US2411898A
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US2415116A
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US2443619A
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US2474275A
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US2471168A
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US2480169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |