US2879420A
Expired / Lapsed
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Assignee: Corning Glass Works
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Filing: 1957-08-28
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Granted: 1959-03-24
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Expires: 1977-08-28
Abstract
No abstract record available.
Inventors
- 👤 George B Hares
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:29
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/41; H01J29/413; B; B01; B01D; B01D3/00; B01D3/14; B01D3/26; B01D3/28; C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; H01B; H01B3/00; H01B3/02; H01B3/08; H01B3/087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
IN AN IMAGE ORTHICON TUBE COMPRISING A GLASS ENVELOPE CONTAINING IN LONGITUDINAL ARRANGEMENT A PHOTOCATHODE, A GRID OF FINE METAL GAUZE, A THIN GLASS TARGET AND AN ELECTRON GUN, THE IMPROVEMENT WHICH COMPRISES MAKING SAID TARGET OF A GLASS CONSISTING ESSENTIALLY BY WEIGHT OF 55%-65% SIO2, ABOUT 25% K2O AND 10% 20% TIO2.
Claim 2
Dependent Claim
53 words
IN AN IMAGE ORTHICON TUBE COMPRISING A GLASS ENVELOPE CONTAINING IN LONGITUDINAL ARRANGEMENT A PHOTOCATHODE, A GRID OF FINE METAL GAUZE, A THIN GLASS TARGET AND AN ELECTRON GUN, THE IMPROVEMENT WHICH COMPRISES MAKING SAID TARGET OF A GLASS CONSISTING ESSENTIALLY BY WEIGHT OF 55%-65% SIO2, ABOUT 25% K2O AND 10% 20% TIO2.
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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |