US2623859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc sulfide phosphors containing gallium
Assignee: Hartford National Bank and Trust Co
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Filing: 1950-08-02
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Granted: 1952-12-30
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Expires: 1970-08-02
Abstract
No abstract record available.
Inventors
- 👤 Kroger Ferdinand Anne
- 👤 Dikhoff Johannes Aloysiu Maria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:33
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/0805; C09K11/0811
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A LUMINESCENT MATERIAL CONSISTING ESSENTIALLY OF A MEMBER OF THE GROUP CONSISTING OF SULPHIDES, SELENIDES, AND SULPHO-SELENIDES OF ZINC AND CADMIUM AND ABOUT 10-4 TO 10-1 ATOMS OF GELLIUM FOR EACH 100 ATOMS OF ZINC AND CADMIUM FOR BUILDING UP CENTERS OF LUMINESCENCE, SAID MEMBER BEING ACTIVATED BY A METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, SILVER AND GOLD.
Claim 2
Dependent Claim
60 words
A LUMINESCENT MATERIAL CONSISTING ESSENTIALLY OF A MEMBER OF THE GROUP CONSISTING OF SULPHIDES, SELENIDES, AND SULPHO-SELENIDES OF ZINC AND CADMIUM AND ABOUT 10-4 TO 10-1 ATOMS OF GELLIUM FOR EACH 100 ATOMS OF ZINC AND CADMIUM FOR BUILDING UP CENTERS OF LUMINESCENCE, SAID MEMBER BEING ACTIVATED BY A METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, SILVER AND GOLD.
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) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |