US3608301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital clock having automatic indication of power failure
Assignee: Quasar Microsystems Inc
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Filing: 1970-04-30
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Granted: 1971-09-28
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Expires: 1990-04-30
Abstract
Abstract IN AN ELECTRICALLY OPERATED TIMEPIECE MEANS ARE PROVIDED TO DETECT THE FAILURE OF THE ELECTRICAL POWER SUPPLY, AND TO THEREUPON DISABLE THE TIME INDICATION. THAT INDICATION REMAINS DISABLED EVEN AFTER THE ELECTRICAL POWER IS RESTORED, AND IS ONLY RE-ENABLED WHEN THE TIMEPIECE IS RESET TO THE CORRECT TIME. D R A W I N G
Inventors
- 👤 Harry R Loewengart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:54
CPC Classifications
G; G04; G04G; G04G9/00; G04G9/08; G04G9/10; G04C; G04C10/00; G04C10/04; G04G5/00; G04G5/02
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |