Patent US2998323A successfully refreshed from Google Patents.
US2998323A
Expired / Lapsed
US
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Method for making luminescent screens
Assignee: Davohn Corp
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Filing: 1957-04-05
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Granted: 1961-08-29
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Expires: 1977-04-05
Abstract
No abstract record available.
Inventors
- 👤 Feldman Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:40
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/221
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A METHOD OF MAKING A LUMINESCENT SCREEN WHICH COMPRISES CONDENSING THE VAPORIZED SOLID COMPONENTS OF AN OXYGEN DOMINATED PHOSPHOR AND A VAPORIZED LUMINESCENCE ACTIVATOR MATERIAL WITHIN A HIGH VACUUM ON A SMOOTH SURFACE OF A REFRACTORY NON-OXIDIZING BASE TO FORM A THIN FILM ON SAID BASE CONTAINING SAID SOLID COMPONENTS IN THE CORRECT PROPORTIONS FOR FORMING THE OXYGEN DOMINATED PHOSPHOR THEREFROM ON BAKING OF SAID FILM IN
Claim 2
Independent Claim
67 words
A METHOD OF MAKING A LUMINESCENT SCREEN WHICH COMPRISES CONDENSING THE VAPORIZED SOLID COMPONENTS OF AN OXYGEN DOMINATED PHOSPHOR AND A VAPORIZED LUMINESCENCE ACTIVATOR MATERIAL WITHIN A HIGH VACUUM ON A SMOOTH SURFACE OF A REFRACTORY NON-OXIDIZING BASE TO FORM A THIN FILM ON SAID BASE CONTAINING SAID SOLID COMPONENTS IN THE CORRECT PROPORTIONS FOR FORMING THE OXYGEN DOMINATED PHOSPHOR THEREFROM ON BAKING OF SAID FILM IN
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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) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |