US2734147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
beckers
Assignee: —
•
Filing: —
•
Granted: 1956-02-07
•
Expires: 1973-02-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:50
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
IN A CATHODE RAY TUBE HAVING A FLUORESCENT COATING AND AN ALECTRON GUN FOR DIRECTING A BEAM OF ELECTRONS ONTO SAID COATING; AN ELECTROSTATIC DEFLECTION SYSTEM DISPOSED BETWEEN SAID GUN AND SAID COATING; SAID SYSTEM COMPRISING A FIRST PAIR OF DEFLECTION PLATES LOCATED BETWEEN SAID GUN AND SAID COATING AND SPACED APART ON DIAMETRICALLY OPPOSITE SIDES OF SAID BEAM; A SECOND PAIR OF DEFLECTION PLATES LOCATED BETWEEN SAID PAIR OF FIRST DEFLECTION PLATES AND SAID COATING AND SPACED APART ON DIAMETRICALLY OPPOSITE SIDES OF SAID BEAM, SAID SECOND PAIR OF PLATES BEING SUBSTANTIALLY PERPENDICULAR TO SAID FIRST PAIR OF PLATES; AND AN ASTIGMATIC ELECTRON LENS COMPRISING A PAIR OF COMPENSATING ELECTRODES CO-ACTING WITH SAID FIRST PAIR OF DEFLECTION PLATES, SAID COMPENSATING ELECTRODES BEING LOCATED ON DIAMETRICALLY OPPOSITE SIDES OF SAID ELECTRON BEAM AND AT AN ANGLE TO SAID FIRST PAIR OF PLATES, ONE OF SAID COMPENSATING ELECTRODES BEING CONNECTED TO EACH PLATE RESPECTIVELY OF SAID FIRST PAIR OF PLATES.
Claim 2
Dependent Claim
159 words
IN A CATHODE RAY TUBE HAVING A FLUORESCENT COATING AND AN ALECTRON GUN FOR DIRECTING A BEAM OF ELECTRONS ONTO SAID COATING; AN ELECTROSTATIC DEFLECTION SYSTEM DISPOSED BETWEEN SAID GUN AND SAID COATING; SAID SYSTEM COMPRISING A FIRST PAIR OF DEFLECTION PLATES LOCATED BETWEEN SAID GUN AND SAID COATING AND SPACED APART ON DIAMETRICALLY OPPOSITE SIDES OF SAID BEAM; A SECOND PAIR OF DEFLECTION PLATES LOCATED BETWEEN SAID PAIR OF FIRST DEFLECTION PLATES AND SAID COATING AND SPACED APART ON DIAMETRICALLY OPPOSITE SIDES OF SAID BEAM, SAID SECOND PAIR OF PLATES BEING SUBSTANTIALLY PERPENDICULAR TO SAID FIRST PAIR OF PLATES; AND AN ASTIGMATIC ELECTRON LENS COMPRISING A PAIR OF COMPENSATING ELECTRODES CO-ACTING WITH SAID FIRST PAIR OF DEFLECTION PLATES, SAID COMPENSATING ELECTRODES BEING LOCATED ON DIAMETRICALLY OPPOSITE SIDES OF SAID ELECTRON BEAM AND AT AN ANGLE TO SAID FIRST PAIR OF PLATES, ONE OF SAID COMPENSATING ELECTRODES BEING CONNECTED TO EACH PLATE RESPECTIVELY OF SAID FIRST PAIR OF PLATES.
References Cited (Backward Citations)
US2083203A
Cited
US2137353A
Cited
US2206668A
Cited
US2182382A
Cited
FR853427A
Cited
GB553466A
Cited
US2574975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-06 | 1959-08-08 | 1960-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-06 | 1963-08-08 | 1964-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-06 | 1967-08-08 | 1968-02-07 | $7700.00 | Window Closed / Lapsed |