Patent US2938459A successfully refreshed from Google Patents.
US2938459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-bearing gimbal
Assignee: North American Aviation Corp
•
Filing: 1956-05-11
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Granted: 1960-05-31
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Expires: 1976-05-11
Abstract
No abstract record available.
Inventors
- 👤 Bernard R Mcgraw
- 👤 James E Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:13
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/80; F02K9/84
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1143659A
Cited
US1180468A
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US1249545A
Cited
US1581802A
Cited
US1625511A
Cited
US1650557A
Cited
US1952425A
Cited
US1996688A
Cited
US2621871A
Cited
US2672740A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |