US2740281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flash lamp
Assignee: Hartford National Bank and Trust Co
•
Filing: 1951-10-19
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Granted: 1956-04-03
•
Expires: 1971-10-19
Abstract
No abstract record available.
Inventors
- 👤 Honing Wilhelm
- 👤 Wijnberg Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:25
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
AN ELECTRICALLY IGNITED FLASH LAMP COMPRISING A BULB OF RADIATION TRANSMITTING MATERIAL HAVING AT LEAST TWO TERMINALS THEREIN, SAID BULB HAVING A VOLUME OF LESS THAN 35 CCS., AN ACTINICALLY ACTIVE SOLID MATERIAL WITHIN SAID BULB IN THE FORM OF STRIPS, A FILLING ATMOSPHERE WITHIN SAID BULB INCLUDING OXYGEN AND A COMBUSTIBLE GAS MIXTURE OF 7 TO 15 PER CENT ACETYLENE BY VOLUME, A FILAMENT CONNECTED TO SAID TERMINALS, AND IGNITION PASTE WITHIN SAID BULB AND ON SAID FILAMENT TO IGNITE SAID MATRIAL WHICH ACTINICALLY BURNS IN SAID OXYGEN TO PRODUCE AN EMISSION OF LIGHT.
References Cited (Backward Citations)
US1995938A
Cited
US2178428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |