US2474537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Position indicator for aircraft
Assignee: Sun Chemical Corp
•
Filing: 1946-03-29
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Granted: 1949-06-28
•
Expires: 1966-03-29
Abstract
No abstract record available.
Inventors
- 👤 James A Macleod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:33
CPC Classifications
B; B64; B64D; B64D25/00; B64D25/08; B64D25/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1836495A
Cited
US1860327A
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US1993341A
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US2192450A
Cited
US2367818A
Cited
US2364787A
Cited
US2389160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-27 | 1952-12-27 | 1953-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-27 | 1956-12-27 | 1957-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-27 | 1960-12-27 | 1961-06-28 | $7700.00 | Window Closed / Lapsed |