US2630478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated magnetic core for fluorescent ballast systems
Assignee: General Electric Co
•
Filing: 1950-12-06
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Granted: 1953-03-03
•
Expires: 1970-12-06
Abstract
No abstract record available.
Inventors
- 👤 Charles A Howlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:36
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/16; H05B41/20; H05B41/23; H05B41/232; H05B41/2325; H01; H01F; H01F38/00; H01F38/08; H01F38/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1875358A
Cited
FR606024A
Cited
US1803868A
Cited
US2310742A
Cited
US2352073A
Cited
US2346621A
Cited
US2440540A
Cited
US2561855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-02 | 1956-09-01 | 1957-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-02 | 1960-09-01 | 1961-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-02 | 1964-09-01 | 1965-03-03 | $7700.00 | Window Closed / Lapsed |