US3226587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode ray tube and magnetic deflection means therefor
Assignee: RCA Corp
•
Filing: 1960-01-28
•
Granted: 1965-12-28
•
Expires: 1980-01-28
Abstract
No abstract record available.
Inventors
- 👤 Chin Te Ning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:19
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/123; H01J31/124
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A CATHODE RAY TUBE COMPRISING A SUBSTANTIALLY RECTANGULAR PLANAR PHOSPHOR SCREEN, A PAIR OF ELECTROMAGNET POLE PIECES DEFINING A GAP THEREBETWEEN ADJACENT TO SAID PHOSPHOR SCREEN FOR PROVIDING IN SAID GAP A MAGNETIC FIELD OF SUBSTANTIALLY UNIFORM STRENGTH ALONG A FIRST DIRECTION PARALLEL TO THE ADJACENT EDGE OF SAID PHOSPHOR SCREEN AND OF NON-UNIFORM STRENGTH ALONG A SECOND DIRECTION PERPENDICULAR TO SAID ADJACENT EDGE, SAID POLE PIECES COMPRISING ALTERNATE LAMINAE OF MAGNETIC AND NONMAGNETIC MATERIAL WITH SAID LAMINAE BEING PERPENDICULAR TO SAID SECOND DIRECTION, AND AN ELECTRON GUN FOR PROJECTING AN ELECTRON BEAM INTO SAID GAP.
Claim 2
Dependent Claim
96 words
A CATHODE RAY TUBE COMPRISING A SUBSTANTIALLY RECTANGULAR PLANAR PHOSPHOR SCREEN, A PAIR OF ELECTROMAGNET POLE PIECES DEFINING A GAP THEREBETWEEN ADJACENT TO SAID PHOSPHOR SCREEN FOR PROVIDING IN SAID GAP A MAGNETIC FIELD OF SUBSTANTIALLY UNIFORM STRENGTH ALONG A FIRST DIRECTION PARALLEL TO THE ADJACENT EDGE OF SAID PHOSPHOR SCREEN AND OF NON-UNIFORM STRENGTH ALONG A SECOND DIRECTION PERPENDICULAR TO SAID ADJACENT EDGE, SAID POLE PIECES COMPRISING ALTERNATE LAMINAE OF MAGNETIC AND NONMAGNETIC MATERIAL WITH SAID LAMINAE BEING PERPENDICULAR TO SAID SECOND DIRECTION, AND AN ELECTRON GUN FOR PROJECTING AN ELECTRON BEAM INTO SAID GAP.
References Cited (Backward Citations)
US2074478A
Cited
US2211614A
Cited
US2454345A
Cited
US2456474A
Cited
US2940020A
Cited
US2824987A
Cited
US2795731A
Cited
US2997621A
Cited
US2935643A
Cited
US3007087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |