Patent US2857752A successfully refreshed from Google Patents.
US2857752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flash lamp
Assignee: General Electric Co
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Filing: 1954-04-07
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Granted: 1958-10-28
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Expires: 1974-04-07
Abstract
No abstract record available.
Inventors
- 👤 Robert M Anderson
- 👤 Paul A Dell
- 👤 John D Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:21
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02; A; A61; A61K; A61K49/00; A61K49/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A FLASH LAMP CONSISTING A SEALED BULB HAVING A VOLUME OF LESS THAN ABOUT 1 0 CC., A MOUNT SEALED INTO SAID BULB, A FILLING OF A COMBUSTION-SUPPORTING GAS IN SAID BULB AT A PRESSURE OF AT LEAST OF THE OTHER OF 700 MM. OF MERCURY, A QUANTITY OF COMBUSTIBLE METALLIC FILAMENTARY MATERIAL LOOSELY DISTRIBUTED WITHIN SAID BULB, THE QUANTITY OF FILAMENTARY MATERIAL IN SAID BULB AMOUNYING T AT LEAST APPROXIMATELY 1/34 MGS. PER CC. OF BULB VOLUME, AND IGNITION MEANS CARRIED BY SAID MOUNT AND LOCATED IN SAID BULB FOR IGNITING SAID COMBUSTIBLE MATERIAL, SAID LAMP PRODUCING A TOTAL LIGHT OUTPUT PER UNIT BULB VOLUME OF AT LEAST 700 LUMEN SECONDS PER CC.
Claim 2
Dependent Claim
114 words
A FLASH LAMP CONSISTING A SEALED BULB HAVING A VOLUME OF LESS THAN ABOUT 1 0 CC., A MOUNT SEALED INTO SAID BULB, A FILLING OF A COMBUSTION-SUPPORTING GAS IN SAID BULB AT A PRESSURE OF AT LEAST OF THE OTHER OF 700 MM. OF MERCURY, A QUANTITY OF COMBUSTIBLE METALLIC FILAMENTARY MATERIAL LOOSELY DISTRIBUTED WITHIN SAID BULB, THE QUANTITY OF FILAMENTARY MATERIAL IN SAID BULB AMOUNYING T AT LEAST APPROXIMATELY 1/34 MGS. PER CC. OF BULB VOLUME, AND IGNITION MEANS CARRIED BY SAID MOUNT AND LOCATED IN SAID BULB FOR IGNITING SAID COMBUSTIBLE MATERIAL, SAID LAMP PRODUCING A TOTAL LIGHT OUTPUT PER UNIT BULB VOLUME OF AT LEAST 700 LUMEN SECONDS PER CC.
References Cited (Backward Citations)
US2046388A
Cited
US2306563A
Cited
US2324959A
Cited
US2351290A
Cited
US2359483A
Cited
US2386672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |