US2586375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating beacon having duplicate lamp systems one of which is automatically energized upon failure of the other
Assignee: Westinghouse Electric Corp
•
Filing: 1947-07-31
•
Granted: 1952-02-19
•
Expires: 1967-07-31
Abstract
No abstract record available.
Inventors
- 👤 Willis A Pennow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:02
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/18; B64F1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1337880A
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US1384659A
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US835493A
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US1095208A
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FR467299A
Cited
US1238220A
Cited
FR496619A
Cited
US1700226A
Cited
FR673423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |