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Patent US2874128A successfully refreshed from Google Patents.
US2874128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphor
Assignee: Westinghouse Electric Corp
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Filing: 1956-12-24
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Granted: 1959-02-17
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Expires: 1976-12-24
Abstract
No abstract record available.
Inventors
- 👤 Wachtel Anselm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:47
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
THE METHOD OF PREPARING AN ELECTROLUMINESCENT ZINCSULFIDE PHOSPHOR ACTIVATED BY COPPER AND COACTIVATED BY CHLORINE: COMPRISING ADMIXING FINELY-DIVIDED ZINC AULFIDE AND COPPER-CONTAINING COMPOUND AND CHLORIDE, THE CHLORIDE PRICIPALLY COMPRISING THOSE CHLORIDES WHICH ON FIRING WILL LEAVE NO METALLIC CONSTITUENTS OTHER THAN THOSE OF THE PHOSPHOR AND SPECIALLY EXCLUDING THE GROUP CONSISTING OF IRON CHLORIDE, COBALT CHLORIDE, NICKEL CHLORIDE AND CHORMIUM CHLORIDE, INSERTING SAID ADMIXTURE INTO A FIRING CONTAINER WHICH IS CLOSED TO CONVECTION PF EXTERIOR GASES BUT WHICH WILL STILL ALLOW THE ESCAPE OF ANY POSITIVE GAS PRESSURES GENERATED THEREIN DURING FIRING; INCLUDING IN SAID FIRING CONTAINER WITH SAID ADMIXTURE AT LEAST ABOUT 1% BY WEIGHT OF SAID MIXTURE OF FREE SULPHUR; ENCLOSING SAID FIRING CONTAINER IN AN INERT ATMOSPHERE; THE AMOUNT OF CHLORIDE IN COMPOUND FORM IN SAID ADMIXTURE EXPRESSED BY THE FORMAULA, SP+ W-0.7 (X+0.076XF+0.004F) (0.97+0.003 GMS. ZNS) THE AMOUNT OF COPPER IN COMPOUND FORM IN SAID ADMIXTURE EXPRESSED BY THE FORMULA,
Claim 2
Independent Claim
154 words
THE METHOD OF PREPARING AN ELECTROLUMINESCENT ZINCSULFIDE PHOSPHOR ACTIVATED BY COPPER AND COACTIVATED BY CHLORINE: COMPRISING ADMIXING FINELY-DIVIDED ZINC AULFIDE AND COPPER-CONTAINING COMPOUND AND CHLORIDE, THE CHLORIDE PRICIPALLY COMPRISING THOSE CHLORIDES WHICH ON FIRING WILL LEAVE NO METALLIC CONSTITUENTS OTHER THAN THOSE OF THE PHOSPHOR AND SPECIALLY EXCLUDING THE GROUP CONSISTING OF IRON CHLORIDE, COBALT CHLORIDE, NICKEL CHLORIDE AND CHORMIUM CHLORIDE, INSERTING SAID ADMIXTURE INTO A FIRING CONTAINER WHICH IS CLOSED TO CONVECTION PF EXTERIOR GASES BUT WHICH WILL STILL ALLOW THE ESCAPE OF ANY POSITIVE GAS PRESSURES GENERATED THEREIN DURING FIRING; INCLUDING IN SAID FIRING CONTAINER WITH SAID ADMIXTURE AT LEAST ABOUT 1% BY WEIGHT OF SAID MIXTURE OF FREE SULPHUR; ENCLOSING SAID FIRING CONTAINER IN AN INERT ATMOSPHERE; THE AMOUNT OF CHLORIDE IN COMPOUND FORM IN SAID ADMIXTURE EXPRESSED BY THE FORMAULA, SP+ W-0.7 (X+0.076XF+0.004F) (0.97+0.003 GMS. ZNS) THE AMOUNT OF COPPER IN COMPOUND FORM IN SAID ADMIXTURE EXPRESSED BY THE FORMULA,
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |