US2813411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoflash lamps
Assignee: General Electric Co
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Filing: 1956-04-30
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Granted: 1957-11-19
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Expires: 1976-04-30
Abstract
No abstract record available.
Inventors
- 👤 Peter D Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:08
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A PHOTOFLASH LAMP COMPRISING A HERMETICALLY SEALED LIGHT TRANSMITTING ENVELOPE, AN OXYGENNOUS ATMOSPHERE WITHIN SAID ENVELOPE, A PAIR OF LEAD-IN ELECTRODES WITHIN SAID ENVELOPE, A HIGH RESISTANCE FILAMENT BRIDGING SAID ELECTRODES, AND A COMBUSTIBLE ACTINIC LIGHT PRODUCING MIXTURE BONDED TO THE INTERIOR ENDS OF SAID ELECTRODES AND ADAPTED TO BE IGNITED BY SAID FILAMENT, SAID MIXTURE COM-PRISING AN OXYGEN LIBERATING SUBSTANCE AND A COMBUSTIBLE METALLIC ALLOY OF A MAJOR CONSTITUENT SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM AND TITANIUM AND 0.5% TO 20% BY WEIGHT OF A MINOR CONSTITUENT SELECTED FROM THE GROUP CONSISTING OF CHROMIUM AND MANGANESE
Claim 2
Dependent Claim
98 words
A PHOTOFLASH LAMP COMPRISING A HERMETICALLY SEALED LIGHT TRANSMITTING ENVELOPE, AN OXYGENNOUS ATMOSPHERE WITHIN SAID ENVELOPE, A PAIR OF LEAD-IN ELECTRODES WITHIN SAID ENVELOPE, A HIGH RESISTANCE FILAMENT BRIDGING SAID ELECTRODES, AND A COMBUSTIBLE ACTINIC LIGHT PRODUCING MIXTURE BONDED TO THE INTERIOR ENDS OF SAID ELECTRODES AND ADAPTED TO BE IGNITED BY SAID FILAMENT, SAID MIXTURE COM-PRISING AN OXYGEN LIBERATING SUBSTANCE AND A COMBUSTIBLE METALLIC ALLOY OF A MAJOR CONSTITUENT SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM AND TITANIUM AND 0.5% TO 20% BY WEIGHT OF A MINOR CONSTITUENT SELECTED FROM THE GROUP CONSISTING OF CHROMIUM AND MANGANESE
References Cited (Backward Citations)
GB503540A
Cited
US2201294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |