US2833948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode ray tube screen
Assignee: GTE Sylvania Inc
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Filing: 1956-02-24
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Granted: 1958-05-06
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Expires: 1976-02-24
Abstract
No abstract record available.
Inventors
- 👤 Lyle W Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:05
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
AN ELECTRON DISCHARGE DEVICE COMPRISING A GLASS ENVELOPE WITH SIDE WALLS AND AN END WALL, A LAYER OF FLUORESCENT MATERIAL DEPOSITED ON SAID END WALL, A FILM OF ELECTRON EMISSIVE MATERIAL DISPOSED UPON SAID LAYER AND EXTENDED TO LIE UPON SAID GLASS ENVELOPE SIDE WALLS, AND AN ANODE FORMED BY A CONDUCTIVE COATING DISPOSED ON SAID SIDE WALLS SPACED FROM SAID FILM TO RECEIVE ELECTRONS EMITTED FROM SAID FILM.
Claim 2
Dependent Claim
69 words
AN ELECTRON DISCHARGE DEVICE COMPRISING A GLASS ENVELOPE WITH SIDE WALLS AND AN END WALL, A LAYER OF FLUORESCENT MATERIAL DEPOSITED ON SAID END WALL, A FILM OF ELECTRON EMISSIVE MATERIAL DISPOSED UPON SAID LAYER AND EXTENDED TO LIE UPON SAID GLASS ENVELOPE SIDE WALLS, AND AN ANODE FORMED BY A CONDUCTIVE COATING DISPOSED ON SAID SIDE WALLS SPACED FROM SAID FILM TO RECEIVE ELECTRONS EMITTED FROM SAID FILM.
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) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |