USRE27259E
Expired / Lapsed
US
⏱️ 0.0 years remaining
In-line plural beam cathode ray tube with an aspherical aperture mask
Assignee: —
•
Filing: 1970-04-01
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Granted: 1971-12-28
•
Expires: 1990-04-01
Abstract
Abstract A PLURAL BEAM CATHODE RAY TUBE COMPRISING A SPHERICAL SCREEN INCLUDING A PLURALITY OF PHOSPHOR DOTS ARRANGED IN ROWS, AS ASPHERICAL MASK ADJACENT THE SPHERICAL SCREEN AND COMPRISING A PLURALITY OF APERTURES ARRANGED IN ROWS, AND A PLURALITY OF ELECTRON GUNS ARRANGED IN AN IN-LINE CONFIGURATION PARALLEL WITH THE ROWS OF THE SCREEN AND THE ROWS OF THE MASK.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:24
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/20; H01J31/201; H01J31/203; H01J31/206; H01J29/00; H01J29/02; H01J29/06; H01J29/07; H01J2229/00; H01J2229/07; H01J2229/0727; H01J2229/0788
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |