Patent US3082175A successfully refreshed from Google Patents.
US3082175A
Expired / Lapsed
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Method of improving electroluminescent phosphor
Assignee: Westinghouse Electric Corp
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Filing: 1959-11-09
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Granted: 1963-03-19
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Expires: 1979-11-09
Abstract
No abstract record available.
Inventors
- 👤 Jr William A Thornton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:11
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
THE METHOD OF INCREASING THE MAINTENANCE OF ELECTROLUMINESCENT LIGHT EMISSION OBTAINABLE FROM FINELYDIVIDED ELECTROLUMINESCENT PHOSPHOR AT LEAST PRINCIPALLY COMPRISING ZINC SULFIDE AND HAVING A PARTICLE SIZE DISTRIBUTION EXTENDING FROM CONSIDERABLY LESS THAN 8 MICRONS TO CONSIDERABLY GREATER THAN 8 MICRONS, WHILE PRESERVING A HIGH DEGREE OF UTILITY FOR THE PHOSPHOR FOR INCORPORATION INTO AN ELECTROLUMINESCENT LAMP, WHICH METHOD COMPRISES, DELETING FROM SAID FINELY-DIVIDED PHOSPHOR SUBSTANTIALLY ALL PHOSPHOR PARTICLES HAVING A DIAMETER LESS THAN 8 MICRONS AND GREATER THAN 25 MICRONS, AND INCORPORATING INTO AN ELECTROLUMINESCENT LAMP ONLY THE REMAINDER OF SAID FINELY DIVIDED PHOSPHOR.
Claim 2
Independent Claim
94 words
THE METHOD OF INCREASING THE MAINTENANCE OF ELECTROLUMINESCENT LIGHT EMISSION OBTAINABLE FROM FINELYDIVIDED ELECTROLUMINESCENT PHOSPHOR AT LEAST PRINCIPALLY COMPRISING ZINC SULFIDE AND HAVING A PARTICLE SIZE DISTRIBUTION EXTENDING FROM CONSIDERABLY LESS THAN 8 MICRONS TO CONSIDERABLY GREATER THAN 8 MICRONS, WHILE PRESERVING A HIGH DEGREE OF UTILITY FOR THE PHOSPHOR FOR INCORPORATION INTO AN ELECTROLUMINESCENT LAMP, WHICH METHOD COMPRISES, DELETING FROM SAID FINELY-DIVIDED PHOSPHOR SUBSTANTIALLY ALL PHOSPHOR PARTICLES HAVING A DIAMETER LESS THAN 8 MICRONS AND GREATER THAN 25 MICRONS, AND INCORPORATING INTO AN ELECTROLUMINESCENT LAMP ONLY THE REMAINDER OF SAID FINELY DIVIDED PHOSPHOR.
References Cited (Backward Citations)
US2911553A
Cited
US2894854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |