US3165476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of processing electroluminescent phosphor
Assignee: Westinghouse Electric Corp
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Filing: 1962-01-15
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Granted: 1965-01-12
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Expires: 1982-01-15
Abstract
No abstract record available.
Inventors
- 👤 Wachtel Anselm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:34
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
THE METHOD OF ENHANCING THE ELECTROLUMINESCENT PERFORMANCE OF FIRED FINELY DIVIDED GROUP IIB METAL SULFIDE ELECTROLUMINESCENT PHOSPHOR WHICH INCLUDES COPPER AS ACTIVATOR, WHICH METHOD COMPRISES, WASHING SAID PHOSPHOR IN A SOLUTION, WHICH IS A GOOD SOLVENT FOR CUPROUS SULFIDE BUT WHICH IS NOT A GOOD SOLVENT FOR GROUP IIB METAL SULFIDE FOR A SUFFICIENT PERIOD OF TIME TO LIGHTEN THE BODY COLOR OF SAID PHOSPHOR, REMOVING RESIDUAL WASHING SOLUTION FROM SAID PHOSPHOR, ADDITIONALLY WASHING SAID PHOSPHOR IN A 5% TO 15% BY WEIGHT HYDROGEN PEROXIDE AQUEOUS SOLUTION FOR A PERIOD OF AT LEAST THIRTY MINUTES AND NOT EXCEEDING SUCH TIME AS WILL PERMIT A SUBSTANTIAL PORTION OF SAID PHOSPHOR TO DISSOLVE, AND THEREAFTER REMOVING FROM SAID PHOSPHOR ANY RESIDUAL HYDROGEN PEROXIDE WASHING SOLUTION.
Claim 2
Independent Claim
123 words
THE METHOD OF ENHANCING THE ELECTROLUMINESCENT PERFORMANCE OF FIRED FINELY DIVIDED GROUP IIB METAL SULFIDE ELECTROLUMINESCENT PHOSPHOR WHICH INCLUDES COPPER AS ACTIVATOR, WHICH METHOD COMPRISES, WASHING SAID PHOSPHOR IN A SOLUTION, WHICH IS A GOOD SOLVENT FOR CUPROUS SULFIDE BUT WHICH IS NOT A GOOD SOLVENT FOR GROUP IIB METAL SULFIDE FOR A SUFFICIENT PERIOD OF TIME TO LIGHTEN THE BODY COLOR OF SAID PHOSPHOR, REMOVING RESIDUAL WASHING SOLUTION FROM SAID PHOSPHOR, ADDITIONALLY WASHING SAID PHOSPHOR IN A 5% TO 15% BY WEIGHT HYDROGEN PEROXIDE AQUEOUS SOLUTION FOR A PERIOD OF AT LEAST THIRTY MINUTES AND NOT EXCEEDING SUCH TIME AS WILL PERMIT A SUBSTANTIAL PORTION OF SAID PHOSPHOR TO DISSOLVE, AND THEREAFTER REMOVING FROM SAID PHOSPHOR ANY RESIDUAL HYDROGEN PEROXIDE WASHING SOLUTION.
References Cited (Backward Citations)
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Cited
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Cited
US2950257A
Cited
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Cited
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Cited
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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) | 1968-01-12 | 1968-07-13 | 1969-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-12 | 1972-07-13 | 1973-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-12 | 1976-07-13 | 1977-01-12 | $7700.00 | Window Closed / Lapsed |