Patent US3384886A successfully refreshed from Google Patents.
US3384886A
Expired / Lapsed
US
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Alarm for emergency lighting system
Assignee: Dual Lite Co Inc
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Filing: 1964-06-10
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Granted: 1968-05-21
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Expires: 1984-06-10
Abstract
No abstract record available.
Inventors
- 👤 Serra Leonildo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:49
CPC Classifications
G; G08; G08B; G08B21/00; G08B21/18; G08B21/185; H; H02; H02J; H02J9/00; H02J9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |