US2754384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Back-up warning device
Assignee: Individual
•
Filing: 1953-05-18
•
Granted: 1956-07-10
•
Expires: 1973-05-18
Abstract
No abstract record available.
Inventors
- 👤 Duane E Atkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:49
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/02; B60Q1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1171596A
Cited
US2398007A
Cited
US2427453A
Cited
US2431117A
Cited
US2580677A
Cited
US2664477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |