Patent US3486070A successfully refreshed from Google Patents.
US3486070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid-state constant power ballast for electric discharge device
Assignee: Westinghouse Electric Corp
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Filing: 1968-04-29
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Granted: 1969-12-23
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Expires: 1988-04-29
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Engel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:36
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M3/156; H02M3/1563; Y; Y10; Y10S; Y10S315/00; Y10S315/07
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) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |