Patent US2747855A successfully refreshed from Google Patents.
Patent US4385106A successfully refreshed from Google Patents.
Patent US2773975A successfully refreshed from Google Patents.
US2773975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor driven lamp hanger
Assignee: THOMPSON ELECTRIC CO
•
Filing: 1951-10-05
•
Granted: 1956-12-11
•
Expires: 1971-10-05
Abstract
No abstract record available.
Inventors
- 👤 Thayer B Farrington
- 👤 Harold L Dalzell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:10
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/36; F21V21/38
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US261262A
Cited
US558993A
Cited
US1631488A
Cited
US2039870A
Cited
US2360713A
Cited
US2391936A
Cited
US2534726A
Cited
US2564328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |