US3716739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron gun support and shielding means
Assignee: GTE Sylvania Inc
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Filing: 1971-08-31
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Granted: 1973-02-13
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Expires: 1991-08-31
Abstract
Abstract IMPROVED MEANS ARE PROVIDED FOR SUPPORTING AND SHIELDING A COMPACT ELECTRON GUN WITHIN THE NECK PORTION OF A CATHODE RAY TUBE. AN ANNULAR MEMBER, DIMENSIONED TO CLOSELY APPROACH THE INTERNAL DIAMETER OF THE NECK, IS FORMED FOR ATTACHMENT TO AT LEAST THREE SPACED-APART STEM LEADS. AN OPEN-ENDED CLOSED-WALL PORTION, UPSTANDING FROM THE CENTRAL APERTURE OF THE ANNULAR MEMBER, IS DIMENSIONED TO ENCOMPASS THE WHOLE OF THE ELECTRON GUM THEREIN. GUN RETENTION MEANS ARE EMPLOYED TO HOLD THE GUM WITHIN THE CLOSED-WALL PORTION IN A MANNER THAT THE FORWARD END OF THE GUN IS POSITIONED AT THE TERMINAL THEREOF.
Inventors
- 👤 D Say
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:53
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/48; H01J29/484; H01J29/82; H01J3/00; H01J3/02; H01J3/026; H01J3/027
Claims Analysis
Total Claims: 0
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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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |