Patent US1904848A successfully refreshed from Google Patents.
US2157448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Model airplane or glider
Assignee: Individual
•
Filing: 1937-10-15
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Granted: 1939-05-09
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Expires: 1957-10-15
Abstract
No abstract record available.
Inventors
- 👤 Back William Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:20
CPC Classifications
A; A63; A63H; A63H27/00; B; B64; B64C; B64C3/00; B64C3/38; B64C3/385
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-05-08 | 1942-11-07 | 1943-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-05-08 | 1946-11-07 | 1947-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-05-08 | 1950-11-07 | 1951-05-09 | $7700.00 | Window Closed / Lapsed |