US2776100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft structural elements and especially wings from reinforced concrete
Assignee: Individual
•
Filing: 1952-04-15
•
Granted: 1957-01-01
•
Expires: 1972-04-15
Abstract
No abstract record available.
Inventors
- 👤 Breguet Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:29
CPC Classifications
B; B64; B64C; B64C3/00; B64C3/26; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR958272A
Cited
US1272139A
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GB126430A
Cited
FR505912A
Cited
DE356154C
Cited
US1457844A
Cited
US1567245A
Cited
US1793775A
Cited
US2106761A
Cited
US2183158A
Cited
US2567124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-01 | 1960-07-02 | 1961-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-01 | 1964-07-02 | 1965-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-01 | 1968-07-02 | 1969-01-01 | $7700.00 | Window Closed / Lapsed |