Patent US2178620A successfully refreshed from Google Patents.
US2596928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device
Assignee: Douglas Aircraft Co Inc
•
Filing: 1947-09-19
•
Granted: 1952-05-13
•
Expires: 1967-09-19
Abstract
No abstract record available.
Inventors
- 👤 Howard J Ide
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:59
CPC Classifications
B; B64; B64C; B64C13/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1886975A
Cited
US2082052A
Cited
US2026814A
Cited
US2038147A
Cited
US2119247A
Cited
US2163731A
Cited
US2262329A
Cited
US2289241A
Cited
US2328258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |