US2620388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination warning signal and trouble lamp
Assignee: Individual
•
Filing: 1952-05-08
•
Granted: 1952-12-02
•
Expires: 1972-05-08
Abstract
No abstract record available.
Inventors
- 👤 Earl E Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:09
CPC Classifications
F; F21; F21L; F21L14/00; F21L14/02; F21L14/023; F21V; F21V17/00; F21V17/007; F21V21/00; F21V21/06; F21V23/00; F21V23/04; F21V23/0407; G; G09; G09F; G09F13/00; G09F13/16; F21W; F21W2111/00; F21W2131/00; F21W2131/10; F21W2131/1005
Claims Analysis
Total Claims: 0
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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) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |