US2521280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal device
Assignee: Individual
•
Filing: 1946-02-26
•
Granted: 1950-09-05
•
Expires: 1966-02-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Melville Bryant Bowman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:11
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/06; B60C23/063
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US186169A
Cited
US724545A
Cited
US1148357A
Cited
US1291647A
Cited
US1409360A
Cited
US1482737A
Cited
US1528202A
Cited
US1606584A
Cited
US1729619A
Cited
US2273413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |