US3198984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Repeating flash circuit for an electric lamp
Assignee: GTE Sylvania Inc
•
Filing: 1959-12-03
•
Granted: 1965-08-03
•
Expires: 1979-12-03
Abstract
No abstract record available.
Inventors
- 👤 Franke Anton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:51
CPC Classifications
H; H05; H05B; H05B39/00; H05B39/09
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
110 words
AN ELECTRIC FLASHING CIRCUIT COMPRISING: A LAMP FILAMENT; A CONDENSER; A RESISTANCE; A BATTERY FOR CHARGING SAID CONDENSER CONNECTED TO SAID CONDENSER THROUGH SAID RESISTANCE; A SWITCH CONNECTED TO DISCHARGE SAID CONDENSER ACROSS SAID FILAMENT WHEN CLOSED; AND A CIRCUIT IN SHUNT TO SAID FILAMENT TO PREHEAT THE SAME PRIOR TO DISCHARGE SAID CONDENSER ACROSS IT, SAID CIRCUIT INCLUDING A SEPARATE BATTERY AND A DIODE CONNECTED IN SERIES OPPOSITION TO THE VOLTAGE OF SAID CONDENSER WHEN THE LATTER IS CHARGED BY THE FIRST-MENTIONED BATTERY, AND IN WHICH THE DIODE IS CONNECTED TO PASS CURRENT IN THE DIRECTION OF CURRENT FLOW FROM SAID SEPARATE BATTERY BUT NOT FROM SAID FIRST-MENTIONED BATTERY.
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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |