Patent US3416840A successfully refreshed from Google Patents.
US3416840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cover assembly having cover with a retaining ring
Assignee: Boeing North American Inc
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Filing: 1966-10-03
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Granted: 1968-12-17
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Expires: 1986-10-03
Abstract
No abstract record available.
Inventors
- 👤 Frederick T Gibbings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:51
CPC Classifications
B; B60; B60B; B60B7/00; B60B7/06; B60B7/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2522271A
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US2660480A
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US2725257A
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FR1061278A
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US2842403A
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US2926958A
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US3265441A
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US3252738A
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US3320002A
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US3317249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |