US2589760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting fixture for circular tubular discharge lamps
Assignee: General Electric Co
•
Filing: 1948-05-28
•
Granted: 1952-03-18
•
Expires: 1968-05-28
Abstract
No abstract record available.
Inventors
- 👤 Elmer J Zelt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:43
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/02; F21S8/04; F21V; F21V21/00; F21V21/02; F21V21/03; F21W; F21W2121/00; F21Y; F21Y2103/00; F21Y2103/30; F21Y2103/33
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1246509A
Cited
US2357057A
Cited
US2406896A
Cited
US2399531A
Cited
US2454243A
Cited
US2462714A
Cited
US2477131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |