US2337253A
Expired / Lapsed
US
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Direct current saturated inductance with relay action
Assignee: ABB Norden Holding AB
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Filing: 1940-03-07
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Granted: 1943-12-21
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Expires: 1960-03-07
Abstract
No abstract record available.
Inventors
- 👤 Lamm Uno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:21
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28; H03K17/288; G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/016; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/2451; G05D23/2456; H03F; H03F9/00; H03F9/02; H03K3/00; H03K3/02; H03K3/45
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-12-20 | 1947-06-21 | 1947-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-12-20 | 1951-06-21 | 1951-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-12-20 | 1955-06-21 | 1955-12-21 | $7700.00 | Window Closed / Lapsed |