US2529990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support for lighting fixtures employing elongated tubular lamps
Assignee: GTE Sylvania Inc
•
Filing: 1945-11-20
•
Granted: 1950-11-14
•
Expires: 1965-11-20
Abstract
No abstract record available.
Inventors
- 👤 Barker Charles Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:52
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/02; F21V21/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2268731A
Cited
US2336599A
Cited
US2329435A
Cited
US2365614A
Cited
US2400267A
Cited
US2392306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-13 | 1954-05-15 | 1954-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-13 | 1958-05-15 | 1958-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-13 | 1962-05-15 | 1962-11-14 | $7700.00 | Window Closed / Lapsed |