US3062750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of zinc sulfide phosphors
Assignee: EIDP Inc
•
Filing: 1959-08-19
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Granted: 1962-11-06
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Expires: 1979-08-19
Abstract
No abstract record available.
Inventors
- 👤 Umberger Jacob Quentin
- 👤 Wahlig Charles Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:44
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/20; C; C09; C09K; C09K11/00; C09K11/08; C09K11/58; C09K11/582; C09K11/584; Y; Y10; Y10S; Y10S148/00; Y10S148/064
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
129 words
A PROCESS FOR IMPROVING THE BODY COLOR AND RESISTANCE TO POISONING BY METALLIC IMPURITIES OF A ZINC SULFIDE PHOSPHOR ACTIVATED WITH A METAL SELECTED FROM THE GROUP CONSISTING OF SILVER, COPPER AND GOLD WHICH COMPRISES CONTACTING THE PHOSPHOR IN ACIDIC AQUEOUS MEDIUM WITH AT LEAST 1 PERCENT BY WEIGHT SOLUTION OF A WATER-SOLUBLE COMPLEXING AGENT FOR SAID METAL ACTIVATOR, SUFFICIENT ZINC IONS AND A WATER-SOLUBLE SULFIED TO FORM A ZINC SULFIDE COATING ON SAID PHOSPHOR EQUIVALENT TO ABOUT 0.09 TO 9.0 PERCENT ZINC SULFIDE BASED ON THE WEIGHT OF THE ORIGINAL PHOSPHOR, THE COMPLEXING AGENT HAVING A STABILITY CONSTANT, K, WITH THE METAL ACTIVATOR GREATER THAN 107 AND BEING SELECTED FROM THE GROUP CONSISTING OF THIOAMIDE COMPOUNDS AND AMMONIUM, ALKALI AND ALKALINE EARTH METAL THIOCYANATES, IODIDES, BROMIDES AND THIOSULFATES.
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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) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |