Patent US2587564A successfully refreshed from Google Patents.
US2587564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic distress signaling device
Assignee: Individual
•
Filing: 1947-06-07
•
Granted: 1952-02-26
•
Expires: 1967-06-07
Abstract
No abstract record available.
Inventors
- 👤 Williams Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:53
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/02; H04B1/03; H04B1/034
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1769500A
Cited
US2160974A
Cited
US2192450A
Cited
US2365587A
Cited
US2300795A
Cited
US2342363A
Cited
US2380587A
Cited
US2357417A
Cited
US2367330A
Cited
US2474537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |