US2448181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric alarm device
Assignee: VIBRA CO SOC DE RESP Ltda
•
Filing: 1945-11-05
•
Granted: 1948-08-31
•
Expires: 1965-11-05
Abstract
No abstract record available.
Inventors
- 👤 Walter P T Holm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:10
CPC Classifications
G; G08; G08B; G08B19/00; G08B19/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1139757A
Cited
US1720230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-31 | 1952-03-01 | 1952-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-31 | 1956-03-01 | 1956-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-31 | 1960-03-01 | 1960-08-31 | $7700.00 | Window Closed / Lapsed |