US3416218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming an expandable metallurgically bonded aluminum cellular core
Assignee: Boeing North American Inc
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Filing: 1964-09-25
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Granted: 1968-12-17
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Expires: 1984-09-25
Abstract
No abstract record available.
Inventors
- 👤 Carl T Armenoff
- 👤 Edward L Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:04
CPC Classifications
B; B23; B23K; B23K20/00; C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/18; C25D5/00; C25D5/02; C25D5/022; B23K2101/00; B23K2101/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3123908A
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US2466890A
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GB714510A
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US3001277A
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US2999306A
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US3016450A
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US3180022A
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US3121785A
Cited
US3206847A
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US3369288A
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 |