US3552896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flash unit
Assignee: US Philips Corp
•
Filing: 1967-03-02
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Granted: 1971-01-05
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Expires: 1987-03-02
Abstract
Abstract A FLASH LAMP UNIT HAS A PLURALITY OF FLASH BULBS CARRIED BY A BASE FOR SEQUENTIAL IGNITION. UPON THE IGNITION OF EACH BULB, A JUNCTION MEANS THEREIN MELTS AND FLOWS TO JOIN A THIRD ELECTRODE WIRE WITHIN THE BULB TO ONE OF THE FIRST AND SECOND POLE WIRES BRIDGED BY THE FILAMENT IN THE BULB. THIS ELECTRODE IS CONNECTED AT ITS REMOTE END TO THE FIRST WIRE IN AN ADJACENT BULB TO PERMIT CLOSING OF ITS IGNITION CIRCUIT.
Inventors
- 👤 Hermann Kuhlmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:15
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/04; G03B15/0442; G03B15/0452; G03B15/0457
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |