US3084271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple arc fluorescent lamp
Assignee: Duro Test Corp
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Filing: 1960-09-06
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Granted: 1963-04-02
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Expires: 1980-09-06
Abstract
No abstract record available.
Inventors
- 👤 Carl E Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:54
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/92
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN AN ELECTRIC DISCHARGE LAMP OF THE FLUORESCENT TYPE, THE COMBINATION COMPRISING A SUBSTANTIALLY TUBULAR OUTER ENVELOPE, A SEPARATOR MEMBER INSIDE OF SAID ENVELOPE TO FORM A PLURALITY OF SEPARATE CHAMBERS, A FILAMENTCATHODE AT EACH END OF SAID ENVELOPE IN EACH OF SAID CHAMBERS TO ESTABLISH AN ELECTRIC DISCHARGE ARC IN EACH OF SAID CHAMBERS BETWEEN THE FILAMENT-CATHODES AT EACH END OF THE RESPECTIVE CHAMBERS AND A PHOSPHOR COATING WHICH RESPONDS TO SAID DISCHARGE ARC ON THE INNER WALL OF SAID ENVELOPE AND ON SAID SEPARATOR MEMBER.
Claim 2
Dependent Claim
87 words
IN AN ELECTRIC DISCHARGE LAMP OF THE FLUORESCENT TYPE, THE COMBINATION COMPRISING A SUBSTANTIALLY TUBULAR OUTER ENVELOPE, A SEPARATOR MEMBER INSIDE OF SAID ENVELOPE TO FORM A PLURALITY OF SEPARATE CHAMBERS, A FILAMENTCATHODE AT EACH END OF SAID ENVELOPE IN EACH OF SAID CHAMBERS TO ESTABLISH AN ELECTRIC DISCHARGE ARC IN EACH OF SAID CHAMBERS BETWEEN THE FILAMENT-CATHODES AT EACH END OF THE RESPECTIVE CHAMBERS AND A PHOSPHOR COATING WHICH RESPONDS TO SAID DISCHARGE ARC ON THE INNER WALL OF SAID ENVELOPE AND ON SAID SEPARATOR MEMBER.
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) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |