Patent US2311144A successfully refreshed from Google Patents.
US3336498A
Expired / Lapsed
US
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Cathode ray tube character generating and display system
Assignee: SCM Corp
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Filing: 1964-03-20
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Granted: 1967-08-15
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Expires: 1984-03-20
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Castanera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:54
CPC Classifications
G; G09; G09G; G09G1/00; G09G1/06; G09G1/14; G09G1/18; H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A CHARACTER GENERATING TUBE COMPRISING: (A) AN ELECTRON GUN FOR PRODUCING A STREAM OF ELECTRONS; (B) A FRONT ANODE WHICH STANDS IN THE PATH OF SAID STREAM OF ELECTRONS, SAID FRONT ANODE BEING MADE OF MATERIAL HAVING LOW SECONDARY EMISSION; (C) A CHARACTER-SHAPED APERTURE IN SAID FRONT ANODE, SAID APERTURE BEING SUBSTANTIALLY LARGER THAN SAID STREAM OF ELECTRONS;
Claim 2
Dependent Claim
58 words
A CHARACTER GENERATING TUBE COMPRISING: (A) AN ELECTRON GUN FOR PRODUCING A STREAM OF ELECTRONS; (B) A FRONT ANODE WHICH STANDS IN THE PATH OF SAID STREAM OF ELECTRONS, SAID FRONT ANODE BEING MADE OF MATERIAL HAVING LOW SECONDARY EMISSION; (C) A CHARACTER-SHAPED APERTURE IN SAID FRONT ANODE, SAID APERTURE BEING SUBSTANTIALLY LARGER THAN SAID STREAM OF ELECTRONS;
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |