US2684440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse-controlled bistable multivibrator
Assignee: Zenith Electronics LLC
•
Filing: 1950-11-24
•
Granted: 1954-07-20
•
Expires: 1970-11-24
Abstract
No abstract record available.
Inventors
- 👤 Henry S Wallace
- 👤 Andre P Tulleners
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:33
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2356761A
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US2405843A
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US2459846A
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US2407458A
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US2435414A
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US2576346A
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US2561475A
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US2476389A
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US2570442A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |