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US2976472A
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US
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Magnetic control circuits
Assignee: AT&T Inc
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Filing: 1960-01-04
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Granted: 1961-03-21
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Expires: 1980-01-04
Abstract
No abstract record available.
Inventors
- 👤 Edmunde E Newhall
- 👤 James R Perucca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:38
CPC Classifications
H; H03; H03B; H03B19/00; H03B19/03; H03K; H03K17/00; H03K17/51; H03K17/80; H03K17/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2923834A
Cited
US2889542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |