Patent US3587468A successfully refreshed from Google Patents.
US3587468A
Expired / Lapsed
US
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Photoflash cartridge having dual flashes
Assignee: Individual
•
Filing: 1968-07-02
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Granted: 1971-06-28
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Expires: 1988-07-02
Abstract
Abstract A PHOTOFLASH CARTRIDGE HAVING FIRST AND SECOND INNER CONTAINERS COUPLED TOGETHER AND SLIDABLY POSITIONED WITHIN A CARTRIDGE CASE, SAID FIRST INNER CONTAINER A KEY FLASH COMPOSITION WHICH IS FIRST IGNITED AND UTILIZED AS A SIGNAL FOR OPENING A CAMERA SHUTTER AND SAID SECOND INNER CONTAINER HAVING A CHARGE OF PHOTOFLASH COMPOSITION WHICH IS IGNITED AFTER SAID KEY FLASH COMPOSITION IS IGNITED TO PROVIDE ILLUMINATION FOR NIGHT AERIAL PHOTOGRAPHY.
Inventors
- 👤 Billy R Bliss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:02
CPC Classifications
F; F42; F42B; F42B5/00; F42B5/02; F42B5/16
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |