Patent US3048731A successfully refreshed from Google Patents.
US3048731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent cell and method
Assignee: Westinghouse Electric Corp
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Filing: 1956-03-22
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Granted: 1962-08-07
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Expires: 1976-03-22
Abstract
No abstract record available.
Inventors
- 👤 Lehmann Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:02
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
THE METHOD OF RENDERING RESPONSIVE TO AN APPLIED ALTERNATING ELECTRIC FIELD A FINELY-DIVIDED LUMINESCENT MATERIAL WHICH IS NORMALLY NOT ELECTROLEUMINESCENT RESPONSIVE TO AN APPLIED ALTERNATING ELECTRIC FIELD ANMD WHICH HAS A RELAXATION TIME WHICH IS GREATER THAN ONE-HALF THE PERIOD FOR ONE CYCLE OF SAID ALTERNATING FIELD, COMPRISING PHYSICALLY ADMIXING IN CONTACTING RELATIONSHIP WITH SAID LUMINESCENT MATERIAL AN ADDITIVE MATERIAL OF AT LEAST ONE OF THE GROUP CONSISTING OF FINELY-DIVIDING METALLIC MATERIAL AND FINELY-DIVIDED SEMI-CONDUCTIVE MATERIAL, SAID FINELYDIVIDED ADDITIVE MATERIAL HAVING SHARNP EDGES AND A RELAXATION TIME WHICH IS NO GREATER THAN ONE-HALF THE PERIOD FOR ONE CYCLE OF SAID ALTERNATING FIELD.
Claim 2
Independent Claim
102 words
THE METHOD OF RENDERING RESPONSIVE TO AN APPLIED ALTERNATING ELECTRIC FIELD A FINELY-DIVIDED LUMINESCENT MATERIAL WHICH IS NORMALLY NOT ELECTROLEUMINESCENT RESPONSIVE TO AN APPLIED ALTERNATING ELECTRIC FIELD ANMD WHICH HAS A RELAXATION TIME WHICH IS GREATER THAN ONE-HALF THE PERIOD FOR ONE CYCLE OF SAID ALTERNATING FIELD, COMPRISING PHYSICALLY ADMIXING IN CONTACTING RELATIONSHIP WITH SAID LUMINESCENT MATERIAL AN ADDITIVE MATERIAL OF AT LEAST ONE OF THE GROUP CONSISTING OF FINELY-DIVIDING METALLIC MATERIAL AND FINELY-DIVIDED SEMI-CONDUCTIVE MATERIAL, SAID FINELYDIVIDED ADDITIVE MATERIAL HAVING SHARNP EDGES AND A RELAXATION TIME WHICH IS NO GREATER THAN ONE-HALF THE PERIOD FOR ONE CYCLE OF SAID ALTERNATING FIELD.
References Cited (Backward Citations)
US2566349A
Cited
US2755406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-06 | 1966-02-05 | 1966-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-06 | 1970-02-05 | 1970-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-06 | 1974-02-05 | 1974-08-07 | $7700.00 | Window Closed / Lapsed |