US2689188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent screen of a phosphor in glass and method for producing same
Assignee: Westinghouse Electric Corp
•
Filing: 1950-12-12
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Granted: 1954-09-14
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Expires: 1970-12-12
Abstract
No abstract record available.
Inventors
- 👤 Walter J Hushley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:13
CPC Classifications
G; G21; G21K; G21K4/00; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/258
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE METHOD OF FORMING A PHOSPHOR SCREEN WHICH COMPRISES FORMING ON A PLATE OF SODA-LIME GLASS A MIXTURE CONSISTING OF ABOUT EQUAL WEIGHTS OF ZINC SULPHIDE AND AN EMBEDDING GLASS, SAID GLASS CONSISTING ESSENTIALLY OF 20% BY WEIGHT SILICA, 3% ALUMINA, 2% MAGNESIA, 65% BORIC OXIDE, 2% LITHIUM OXIDE, 5% SODIUM OXIDE AND 3% POTASSIUM OXIDE, ALL SAID PERCENTAGES BEING BY WEIGHT, AND HEATING SAID GLASS PLATE TO ABOUT 680* C. FOR ABOUT HALF AN HOUR.
Claim 2
Independent Claim
76 words
THE METHOD OF FORMING A PHOSPHOR SCREEN WHICH COMPRISES FORMING ON A PLATE OF SODA-LIME GLASS A MIXTURE CONSISTING OF ABOUT EQUAL WEIGHTS OF ZINC SULPHIDE AND AN EMBEDDING GLASS, SAID GLASS CONSISTING ESSENTIALLY OF 20% BY WEIGHT SILICA, 3% ALUMINA, 2% MAGNESIA, 65% BORIC OXIDE, 2% LITHIUM OXIDE, 5% SODIUM OXIDE AND 3% POTASSIUM OXIDE, ALL SAID PERCENTAGES BEING BY WEIGHT, AND HEATING SAID GLASS PLATE TO ABOUT 680* C. FOR ABOUT HALF AN HOUR.
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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) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |