Patent US3052121A successfully refreshed from Google Patents.
US3052121A
Expired / Lapsed
US
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Aircraft pilot instrument
Assignee: Bell Aerospace Corp
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Filing: 1958-11-12
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Granted: 1962-09-04
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Expires: 1978-11-12
Abstract
No abstract record available.
Inventors
- 👤 Goldin Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:25
CPC Classifications
B; B64; B64D; B64D43/00; G; G01; G01K; G01K3/00; G01K3/02; G01K3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1877810A
Cited
US1977498A
Cited
US2114185A
Cited
US2138941A
Cited
US2505521A
Cited
US2472795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |