US2478129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic emergency light
Assignee: Individual
•
Filing: 1945-11-14
•
Granted: 1949-08-02
•
Expires: 1965-11-14
Abstract
No abstract record available.
Inventors
- 👤 Powell John Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:43
CPC Classifications
F; F21; F21S; F21S9/00; F21S9/02; F21S9/022; F21L; F21L2/00; F21V; F21V23/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1211121A
Cited
US1365636A
Cited
US1511097A
Cited
US2097237A
Cited
US2213584A
Cited
US2369288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |