Patent US3414768A successfully refreshed from Google Patents.
US3414768A
Expired / Lapsed
US
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Semiconductor ballast for discharge lamp
Assignee: GTE Sylvania Inc
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Filing: 1966-01-03
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Granted: 1968-12-03
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Expires: 1986-01-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Sandford C Peek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:07
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/36; H05B41/38; H05B41/39; H05B41/392; Y; Y10; Y10S; Y10S315/00; Y10S315/02; Y10S315/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3163782A
Cited
US3240991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |