US2869037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent lamp ballast
Assignee: General Electric Co
•
Filing: 1957-06-07
•
Granted: 1959-01-13
•
Expires: 1977-06-07
Abstract
No abstract record available.
Inventors
- 👤 Wesley W Brooks
- 👤 Charles E Strecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:20
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/08; H01F38/10
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) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |