US1527792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric signal lamp
Assignee: Individual
•
Filing: 1921-10-21
•
Granted: 1925-02-24
•
Expires: 1941-10-21
Abstract
No abstract record available.
Inventors
- 👤 Henry W French
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:38
CPC Classifications
F; F21; F21V; F21V17/00; F21L; F21L14/00; G; G09; G09F; G09F21/00; G09F21/02; Y; Y10; Y10S; Y10S200/00; Y10S200/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1928-02-24 | 1928-08-25 | 1929-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-02-24 | 1932-08-25 | 1933-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-02-24 | 1936-08-25 | 1937-02-24 | $7700.00 | Window Closed / Lapsed |