Patent US3287601A successfully refreshed from Google Patents.
US3287601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-lamp mercury ballast
Assignee: GTE Sylvania Inc
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Filing: 1963-12-18
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Granted: 1966-11-22
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Expires: 1983-12-18
Abstract
No abstract record available.
Inventors
- 👤 Anthony R Collucci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:07
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/16; H05B41/20; H05B41/23; H05B41/231; Y; Y10; Y10S; Y10S315/00; Y10S315/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A CIRCUIT FOR STARTING AND OPERATING ELECTRIC DISCHARGE LAMPS COMPRISING A TRANSFORMER HAVING AT LEAST ONE PRIMARY WINDING AND AT LEAST TWO SECONDARY WINDINGS, EACH OF SAID SECONDARY WINDINGS HAVING A CAPACITOR AND AN ELECTRIC DISCHARGE LAMP CONNECTED IN SERIES WITH IT, THE TWO SECONDARIES BEING BOTH ON THE SAME LEG OF THE TRANSFORMER SO THAT CURRENT FLOW THROUGH ONE SECONDARY WILL INCREASE THE FLUX THROUGH THE OTHER, AND A THIRD CAPACITOR, SAID THIRD CAPACITOR BEING CONNECTED ACROSS AT LEAST PART OF SAID TWO SECONDARY WINDINGS TO RAISE THE STARTING VOLTAGE.
Claim 2
Dependent Claim
91 words
A CIRCUIT FOR STARTING AND OPERATING ELECTRIC DISCHARGE LAMPS COMPRISING A TRANSFORMER HAVING AT LEAST ONE PRIMARY WINDING AND AT LEAST TWO SECONDARY WINDINGS, EACH OF SAID SECONDARY WINDINGS HAVING A CAPACITOR AND AN ELECTRIC DISCHARGE LAMP CONNECTED IN SERIES WITH IT, THE TWO SECONDARIES BEING BOTH ON THE SAME LEG OF THE TRANSFORMER SO THAT CURRENT FLOW THROUGH ONE SECONDARY WILL INCREASE THE FLUX THROUGH THE OTHER, AND A THIRD CAPACITOR, SAID THIRD CAPACITOR BEING CONNECTED ACROSS AT LEAST PART OF SAID TWO SECONDARY WINDINGS TO RAISE THE STARTING VOLTAGE.
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |