Patent US2493437A successfully refreshed from Google Patents.
US2493437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal device
Assignee: Individual
•
Filing: 1946-10-11
•
Granted: 1950-01-03
•
Expires: 1966-10-11
Abstract
No abstract record available.
Inventors
- 👤 Howard L Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:01
CPC Classifications
G; G06; G06M; G06M3/00; G06M3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1761950A
Cited
US1948946A
Cited
US1891335A
Cited
US1872838A
Cited
US2130613A
Cited
US2260541A
Cited
US2253827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |