US2859431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual alarm system
Assignee: Individual
•
Filing: 1956-12-10
•
Granted: 1958-11-04
•
Expires: 1976-12-10
Abstract
No abstract record available.
Inventors
- 👤 Jean M Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:13
CPC Classifications
G; G21; G21C; G21C17/00; G21C17/10; G01; G01P; G01P13/00; G01P13/0006; G01P13/0066; G08; G08B; G08B26/00; G08B26/008; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2375130A
Cited
US2558178A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |