US3303674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flash lamp
Assignee: General Electric Co
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Filing: 1965-04-30
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Granted: 1967-02-14
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Expires: 1985-04-30
Abstract
No abstract record available.
Inventors
- 👤 Robert M Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:44
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
A FLASH LAMP COMPRISING A SEALED BULB CONSISTING OF A SHORT LENGTH OF GLASS TUBING OF SUBSTANTIALLY UNIFORM WALL THICKNESS THROUGHOUT AND SEALED AT EACH END, A FILLING OF A COMBUSTION-SUPPORTING GAS IN SAID BULB AT A PRESSURE OF AT LEAST SEVERAL ATMOSPHERES, A QUANTITY OF COMBUSTIBLE SHEET FOIL MATERIAL LOCATED WITHIN SAID BULB AND CONSISTING ESSENTIALLY OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM, THORIUM, HAFNIUM AND COMBINATIONS THEREOF, SAID FOIL MATERIAL HAVING A CONFIGURATION AND DIMENSIONS AT LEAST GREAT ENOUGH SO THAT THE FOIL RESILIENTLY CONTACTS THE BULB WALL TENDING TO HOLD THE FOIL IN POSITION, AND IGNITION MEANS AT ONE END OF SAID BULB FOR IGNITING SAID COMBUSTIBLE MATERIAL, AND A QUANTITY OF COMBUSTIBLE FILAMENTARY STRAND MATERIAL LOOSELY DISTRIBUTED WITHIN SAID BULB AND BEING SUBSTANTIALLY CLOSER IN PROXIMITY TO SAID IGNITION MEANS THAN IS SAID FOIL MATERIAL, SAID FILAMENTARY STRAND MATERIAL CONSISTING ESSENTIALLY OF MATERIALS SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM, THORIUM, HAFNIUM AND COMBINATIONS THEREOF, AND SAID LAMP GENERATING A TOTAL LIGHT OUTPUT PER UNIT BULB VOLUME OF AT LEAST 3,000 LUMEN-SECONDS PER CC.
Claim 2
Dependent Claim
180 words
A FLASH LAMP COMPRISING A SEALED BULB CONSISTING OF A SHORT LENGTH OF GLASS TUBING OF SUBSTANTIALLY UNIFORM WALL THICKNESS THROUGHOUT AND SEALED AT EACH END, A FILLING OF A COMBUSTION-SUPPORTING GAS IN SAID BULB AT A PRESSURE OF AT LEAST SEVERAL ATMOSPHERES, A QUANTITY OF COMBUSTIBLE SHEET FOIL MATERIAL LOCATED WITHIN SAID BULB AND CONSISTING ESSENTIALLY OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM, THORIUM, HAFNIUM AND COMBINATIONS THEREOF, SAID FOIL MATERIAL HAVING A CONFIGURATION AND DIMENSIONS AT LEAST GREAT ENOUGH SO THAT THE FOIL RESILIENTLY CONTACTS THE BULB WALL TENDING TO HOLD THE FOIL IN POSITION, AND IGNITION MEANS AT ONE END OF SAID BULB FOR IGNITING SAID COMBUSTIBLE MATERIAL, AND A QUANTITY OF COMBUSTIBLE FILAMENTARY STRAND MATERIAL LOOSELY DISTRIBUTED WITHIN SAID BULB AND BEING SUBSTANTIALLY CLOSER IN PROXIMITY TO SAID IGNITION MEANS THAN IS SAID FOIL MATERIAL, SAID FILAMENTARY STRAND MATERIAL CONSISTING ESSENTIALLY OF MATERIALS SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM, THORIUM, HAFNIUM AND COMBINATIONS THEREOF, AND SAID LAMP GENERATING A TOTAL LIGHT OUTPUT PER UNIT BULB VOLUME OF AT LEAST 3,000 LUMEN-SECONDS PER CC.
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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |