Patent DE3336265C2 successfully refreshed from Google Patents.
US2791111A
Expired / Lapsed
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Fulminator for photoflash lamps
Assignee: Westinghouse Electric Corp
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Filing: 1953-01-15
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Granted: 1957-05-07
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Expires: 1973-01-15
Abstract
No abstract record available.
Inventors
- 👤 William E Gleim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:15
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
131 words
A PASTE TYPE FULMINATOR PHOTOFLASH LAMP COMPRISING A MOUNT HAVING LEADS SUPPORTING A FILAMENT AND PASTE FULMINATORS ON THE ENDS OF SAID LEADS, SAID FULMINATORS CONSISTING OF A MIXTURE OF A COMBUSTIBLE AND AN OXIDIZER, SAID FULMINATORS EACH HAVING AN OUTER AND AN INNER LAYER, SAID OUTER LAYER BEING RICHER IN COMBUSTIBLE THAN SAID INNER LAYER, SAID PHOTOFLASH LAMP HAVING AN HERMETICALLY SEALED RADIATION TRANSMITTING ENVELOPE SURROUNDING SAID LEADS AND HAVING AN OXYGEN ATMOSPHERE THEREIN, AND A PORTION OF BOTH SAID INNER AND SAID OUTER LAYERS BEING IN DIRECT CONTACT WITH SAID FILAMENT, THE COMBUSTIBLE OF SAID OUTER FULMINATOR LAYER ON BEING IGNITED BY SAID FILAMENT REACTING PRIMARILY WITH SAID OXYGEN ATMOSPHERE, AND THE COMBUSTIBLE OF SAID INNER FULMINATOR LAYER THERAFTER REACTING PRIMARILY WITH THE OXIDIZER OF SAID INNER FULMINATOR LAYER.
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) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |