Patent US2451875A successfully refreshed from Google Patents.
US2451875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traffic signaling device
Assignee: Grote Manufacturing Co
•
Filing: 1945-10-17
•
Granted: 1948-10-19
•
Expires: 1965-10-17
Abstract
No abstract record available.
Inventors
- 👤 Charles D Ryder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:07
CPC Classifications
B; B60; B60Q; B60Q7/00; B60Q7/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |