US2548278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft course stabilizing means
Assignee: Collins Radio Co
•
Filing: 1949-08-17
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Granted: 1951-04-10
•
Expires: 1969-08-17
Abstract
No abstract record available.
Inventors
- 👤 Walter H Wirkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:57
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/0202
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1703280A
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US1703317A
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US2259600A
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US2257757A
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GB516567A
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US2372185A
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US2423337A
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FR934544A
Cited
US2490660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |