US2609170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor-driven lamp hanger
Assignee: THOMPSON ELECTRIC CO
•
Filing: 1948-03-19
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Granted: 1952-09-02
•
Expires: 1968-03-19
Abstract
No abstract record available.
Inventors
- 👤 Thayer B Farrington
- 👤 Harold L Dalzell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:57
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/36; F21V21/38
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) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |