US2663838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gyroscope system for dirigible craft
Assignee: Westinghouse Electric Corp
•
Filing: 1947-11-14
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Granted: 1953-12-22
•
Expires: 1967-11-14
Abstract
No abstract record available.
Inventors
- 👤 Ivar M Holliday
- 👤 George R Douglas
- 👤 Clinton R Hanna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:33
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/0206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1966170A
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US2014825A
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US2203671A
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US2415430A
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US2516796A
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US2539411A
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US2442116A
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US2471821A
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US2464629A
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US2611559A
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US2513120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |