Patent US2887401A successfully refreshed from Google Patents.
US2887401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of transparent luminescent screens
Assignee: General Electric Co
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Filing: 1956-06-27
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Granted: 1959-05-19
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Expires: 1976-06-27
Abstract
No abstract record available.
Inventors
- 👤 Dominic A Cusano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:07
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/221
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
THE METHOD OF PREPARING THICK LAMINATED TRANSPARENT SCREENS OF A LUMINESCENT PHOSPHOR WHICH METHOD COMPRISES REACTING IN A TREATMENT CHAMBER AT THE SURFACE OF A HEATED TRANSPARENT VITREOUS PLATE VAPORS OF THE PHOSPHOR CATION AND VAPORS OF AN ACTIVATOR FOR THE PHOSPHOR WITH A GAS CONTAINING THE PHOSPHOR ANION TO FORM BY CHEMICAL DEPOSITION A THIN FILM OF ACTIVATED PHOSPHOR, REMOVING THE PLATE FROM THE TREATMENT CHAMBER, POLISHING THE EXPOSED SURFACE OF THE PHOSPHOR FILM TO OPTICAL SMOOTHNESS BY RUBBING WITH AN ABRASIVE SUBSTANCE, AND REPEATING THE STEPS OF PHOSPHOR FILM DEPOSITION AND SURFACE POLISHING UNTIL A DESIRED THICKNESS IS ATTAINED.
Claim 2
Independent Claim
101 words
THE METHOD OF PREPARING THICK LAMINATED TRANSPARENT SCREENS OF A LUMINESCENT PHOSPHOR WHICH METHOD COMPRISES REACTING IN A TREATMENT CHAMBER AT THE SURFACE OF A HEATED TRANSPARENT VITREOUS PLATE VAPORS OF THE PHOSPHOR CATION AND VAPORS OF AN ACTIVATOR FOR THE PHOSPHOR WITH A GAS CONTAINING THE PHOSPHOR ANION TO FORM BY CHEMICAL DEPOSITION A THIN FILM OF ACTIVATED PHOSPHOR, REMOVING THE PLATE FROM THE TREATMENT CHAMBER, POLISHING THE EXPOSED SURFACE OF THE PHOSPHOR FILM TO OPTICAL SMOOTHNESS BY RUBBING WITH AN ABRASIVE SUBSTANCE, AND REPEATING THE STEPS OF PHOSPHOR FILM DEPOSITION AND SURFACE POLISHING UNTIL A DESIRED THICKNESS IS ATTAINED.
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) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |