Patent US2925511A successfully refreshed from Google Patents.
US2925511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold cathode vacuum lamp
Assignee: Tung Sol Electric Inc
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Filing: 1958-07-15
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Granted: 1960-02-16
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Expires: 1978-07-15
Abstract
No abstract record available.
Inventors
- 👤 Albert M Skellett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:58
CPC Classifications
H; H01; H01J; H01J63/00; H01J63/02; H01J63/04; H01J1/00; H01J1/02; H01J1/30; H01J2893/00; H01J2893/0031
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A LAMP COMPRISING AN EVACUATED ENVELOPE, TWO TRANSPARENT CONDUCTIVE FILMS ON DIFFERENT PORTIONS OF THE INNER WALL OF THE ENVELOPE, A CATHODO-LUMINESCENT PHOSPHOR LAYER ON EACH FILM, A CATHODE WITHIN THE ENVELOPE COMPRISING A CONDUCTIVE MEMBER COATED WITH A POROUS SPONGE-LIKE LAYER OF MAGNESIUM OXILDE AND STARTING MEANS IN THE ENVELOPE ADAPTED WHEN ENERGIZED TO IRRIDIATE THE MAGNESIUM OXIDE COATING WITH UTTRAVILOET LIGHT TO INITIATE ELECTRON EMISSION THEREFROM, ELECTRONS FROM SAID COATING WHEN ATTRACTED TO SAID CONDUCTING FILMS BY ELECTRIC POTENTIALS IMPRESSED THEREON, STRIKING SAID CATHODO-LUMINESCENT PHOSPHOR LAYER AND CAUSING LUMINESCENCE THEREOF.
Claim 2
Dependent Claim
92 words
A LAMP COMPRISING AN EVACUATED ENVELOPE, TWO TRANSPARENT CONDUCTIVE FILMS ON DIFFERENT PORTIONS OF THE INNER WALL OF THE ENVELOPE, A CATHODO-LUMINESCENT PHOSPHOR LAYER ON EACH FILM, A CATHODE WITHIN THE ENVELOPE COMPRISING A CONDUCTIVE MEMBER COATED WITH A POROUS SPONGE-LIKE LAYER OF MAGNESIUM OXILDE AND STARTING MEANS IN THE ENVELOPE ADAPTED WHEN ENERGIZED TO IRRIDIATE THE MAGNESIUM OXIDE COATING WITH UTTRAVILOET LIGHT TO INITIATE ELECTRON EMISSION THEREFROM, ELECTRONS FROM SAID COATING WHEN ATTRACTED TO SAID CONDUCTING FILMS BY ELECTRIC POTENTIALS IMPRESSED THEREON, STRIKING SAID CATHODO-LUMINESCENT PHOSPHOR LAYER AND CAUSING LUMINESCENCE THEREOF.
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) | 1963-02-15 | 1963-08-17 | 1964-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-15 | 1967-08-17 | 1968-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-15 | 1971-08-17 | 1972-02-16 | $7700.00 | Window Closed / Lapsed |