US2457512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highway warning signal
Assignee: ALBERT G MCCALEB
•
Filing: 1944-10-27
•
Granted: 1948-12-28
•
Expires: 1964-10-27
Abstract
No abstract record available.
Inventors
- 👤 Harold B Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:28
CPC Classifications
E; E01; E01F; E01F9/00; E01F9/50; E01F9/529; Y; Y10; Y10S; Y10S116/00; Y10S116/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1265404A
Cited
US1357860A
Cited
US1671303A
Cited
US2077749A
Cited
US2185020A
Cited
US2142803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |