US3196305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically scanned cathode ray tube with raster altering means
Assignee: RCA Corp
•
Filing: 1961-12-07
•
Granted: 1965-07-20
•
Expires: 1981-12-07
Abstract
No abstract record available.
Inventors
- 👤 Barkow William Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:02
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/20; H01J31/208; H01J29/00; H01J29/46; H01J29/70; H01J29/701; H01J29/702; H01J2229/00; H01J2229/56; H01J2229/568; H01J2229/5681; H01J2229/5684
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
121 words
A CATHODE RAY TUBE COMPRISING A LIUMINESCENT SCREEN INCLUDING A PLURALITY OF LAYERS OF DIFFERENT PHOSPHORS, A PLURALITY OF ELECTRON GUNS FOR PROJECTIN DIFFERENT VELOCITY ELECTRON BEAMS TOWARDS SAID SCREEN, A COMMON DEFLECTION ZONE DISPOSED BETWEEN SAID SCREEEN AND SAID GUNS FOR HAVING MAGNETIC DEFLECTION FIELDS ESTABLISHED THEREIN FOR DEFECTING SAID BEAMS IN MUTUALLY PERPENDICULAR DIRECTIONS TWO OF SAID GUNS HAVING MAGNETIC TUBULAR SHIELDS SURROUNDING PORTIONS OF THEIR BEAM PATHS IN SAID ZONE ONE OF SAID GUNS HAVING A PAIR OF ELONGATED FIELD ENHANCERS OF MAGNETIC MATERIAL ON OPPOSITE SIDES OF THE BEAM PATH THEREOF IN SAID ZONE, EACH OF SAID FIELD ENHANCERS HAVING A SUBSTANTIAL DIMENSION IN THE DIRECTION TRANSVERSE TO SAID BEAM PATH OF SAID ONE OF SAID GUNS.
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) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |