Patent US3697301A successfully refreshed from Google Patents.
US3697301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of forming cathode ray tube screens to utilize the luminous efficiency of the phosphor material
Assignee: GTE Sylvania Inc
•
Filing: 1971-04-05
•
Granted: 1972-10-10
•
Expires: 1991-04-05
Abstract
Abstract A PROCESS OF FORMING A CATHODOLUMINESCENT SCREEN OF A CATHODE RAY TUBE WHEREIN THE CHARACTERISTICS OF THE PHOSPHOR MATERIAL, I.E., PARTICLE DENSITY, BULK DENSITY, ATOMIC WEIGHT, ATOMIC NUMBER AND AVERAGE PARTICLE SIZE ARE RELATED IN A MANNER TO PROVIDE A SCREEN HAVING A PRESCRIBED PHOSPHOR WEIGHT AND THICKNESS TO EFFECT EFFICIENT UTILIZATION OF THE LUMINESCENT BRIGHTNESS OF THE RESPECTIVE PHOSPHOR MATERIAL WHEN EXCITED BY SUBSEQUENT ELECTRON BEAM IMPINGEMENT.
Inventors
- 👤 Robert L Donofrio
- 👤 Charles H Rehkopf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:58
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/20; H01J9/00; H01J9/20; H01J9/22; H01J9/227; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/26; Y10T428/263; Y10T428/27
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |