US2774682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a phosphor screen
Assignee: RCA Corp
•
Filing: 1952-10-15
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Granted: 1956-12-18
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Expires: 1972-10-15
Abstract
No abstract record available.
Inventors
- 👤 Larach Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:37
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/221; H01J9/223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
THE METHOD OF FORMING A PHOSPHOR SCREEN ON A SUBSTRATE, SAID METHOD COMPRISING THE STEPS OF PREPARING A WATER SUSPENSION OF FINELY DIVIDED PHOSPHOR PARTICLES, INTRODUCING SAID SUSPENSION INTO A SOLUTION OF AN ALKALI HALIDE TO FORM A SECOND SUSPENSION, THROUGHLY MIXING THE CONSTITUENTS OF SAID SECOND SUSPENSION IN ORDER TO ADSORB HALIDE IONS ONTO THE SURFACES OF EACH OF SAID PHOSPHOR PARTICLES, TREATING SAID PHOSPHOR PARTICLES AND ADSORBED HALIDE IONS WITH AN ALKALI SILICATE TO FORM A BINDER SHEATH AROUND SAID PHOSPHOR PARTICLES, FORMING A SUSPENIONS OF SAID SHEATHED PHOSPHOR PARTICLES, INTRODUCING SAID LAST MEMTIONED SUSPENSION OVER SAID SUBSTRATE, AND SETTLING SAID SHEATHED PARTICLES ONTO SAID SUBSTRATE THROUGH A NEUTRAL SETTLING MEDIUM.
Claim 2
Independent Claim
113 words
THE METHOD OF FORMING A PHOSPHOR SCREEN ON A SUBSTRATE, SAID METHOD COMPRISING THE STEPS OF PREPARING A WATER SUSPENSION OF FINELY DIVIDED PHOSPHOR PARTICLES, INTRODUCING SAID SUSPENSION INTO A SOLUTION OF AN ALKALI HALIDE TO FORM A SECOND SUSPENSION, THROUGHLY MIXING THE CONSTITUENTS OF SAID SECOND SUSPENSION IN ORDER TO ADSORB HALIDE IONS ONTO THE SURFACES OF EACH OF SAID PHOSPHOR PARTICLES, TREATING SAID PHOSPHOR PARTICLES AND ADSORBED HALIDE IONS WITH AN ALKALI SILICATE TO FORM A BINDER SHEATH AROUND SAID PHOSPHOR PARTICLES, FORMING A SUSPENIONS OF SAID SHEATHED PHOSPHOR PARTICLES, INTRODUCING SAID LAST MEMTIONED SUSPENSION OVER SAID SUBSTRATE, AND SETTLING SAID SHEATHED PARTICLES ONTO SAID SUBSTRATE THROUGH A NEUTRAL SETTLING MEDIUM.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |