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US2572080A
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Pulse width controlling relay system
Assignee: STC PLC
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Filing: 1945-10-03
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Granted: 1951-10-23
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Expires: 1965-10-03
Abstract
No abstract record available.
Inventors
- 👤 Fred C Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:14
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/04; C; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/08; C07D209/10; C07D401/00; C07D401/02; C07D401/04; C07D401/12; H03K7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB491741A
Cited
US2294863A
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US2405070A
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US2405069A
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US2409897A
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US2419340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |