US2578239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enclosed rotating signal light
Assignee: FEDERAL ENTERPRISES Inc
•
Filing: 1948-09-02
•
Granted: 1951-12-11
•
Expires: 1968-09-02
Abstract
No abstract record available.
Inventors
- 👤 Earl W Gosswiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:18
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/2611
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US590949A
Cited
US1238220A
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US1417457A
Cited
US1486731A
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US1423726A
Cited
US2224742A
Cited
US2508071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |