Patent US4166455A successfully refreshed from Google Patents.
Patent US3416218A successfully refreshed from Google Patents.
US3416218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming an expandable metallurgically bonded aluminum cellular core
Assignee: Boeing North American Inc
•
Filing: 1964-09-25
•
Granted: 1968-12-17
•
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 19:25
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3123908A
Cited
US2466890A
Cited
GB714510A
Cited
US3001277A
Cited
US2999306A
Cited
US3016450A
Cited
US3180022A
Cited
US3121785A
Cited
US3206847A
Cited
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 |