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US2758221A
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Magnetic switching device
Assignee: RCA Corp
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Filing: 1952-11-05
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Granted: 1956-08-07
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Expires: 1972-11-05
Abstract
No abstract record available.
Inventors
- 👤 Raymond S Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:06
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/45; H03K5/00; H03K5/15; H03K5/15013; H03K5/15026; H03K5/15046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2652501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-07 | 1960-02-06 | 1960-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-07 | 1964-02-06 | 1964-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-07 | 1968-02-06 | 1968-08-07 | $7700.00 | Window Closed / Lapsed |