US2431656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent lighting fixture
Assignee: GTE Sylvania Inc
•
Filing: 1944-10-13
•
Granted: 1947-11-25
•
Expires: 1964-10-13
Abstract
No abstract record available.
Inventors
- 👤 Barker Charles Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:51
CPC Classifications
F; F21; F21V; F21V17/00; F21V17/10; F21V17/102; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2327230A
Cited
US1093619A
Cited
US2283782A
Cited
US2331774A
Cited
US2329435A
Cited
US2365614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-24 | 1951-05-26 | 1951-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-24 | 1955-05-26 | 1955-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-24 | 1959-05-26 | 1959-11-25 | $7700.00 | Window Closed / Lapsed |