US2597660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc sulfide type phosphors
Assignee: General Electric Co
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Filing: 1950-03-15
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Granted: 1952-05-20
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Expires: 1970-03-15
Abstract
No abstract record available.
Inventors
- 👤 Alfred H Mckeag
- 👤 Peter W Ranby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:42
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/70; C09K11/701; C09K11/703
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A LUMINESCENT MATERIAL COMPRISING A MATRIX CONSISTING ESSENTIALLY OF MATERIAL OF THE GROUP CONSISTING OF ZINC SULPHIDE ALONE AND ZINC SULPHIDE HAVING UP TO ABOUT 20 PER CENT BY WEIGHT OF THE SULPHUR THEREIN REPLACED BY MATERIAL OF THE GROUP CONSISTING OF SELENIUM AND TELLURIUM AND MIXTURES THEREOF, AND AN ACTIVATING PROPORTION OF PHOSPHORUS AMOUNTING TO ABOUT .02 TO 10 PER CENT BY WEIGHT OF THE MATRIX.
Claim 2
Dependent Claim
67 words
A LUMINESCENT MATERIAL COMPRISING A MATRIX CONSISTING ESSENTIALLY OF MATERIAL OF THE GROUP CONSISTING OF ZINC SULPHIDE ALONE AND ZINC SULPHIDE HAVING UP TO ABOUT 20 PER CENT BY WEIGHT OF THE SULPHUR THEREIN REPLACED BY MATERIAL OF THE GROUP CONSISTING OF SELENIUM AND TELLURIUM AND MIXTURES THEREOF, AND AN ACTIVATING PROPORTION OF PHOSPHORUS AMOUNTING TO ABOUT .02 TO 10 PER CENT BY WEIGHT OF THE MATRIX.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |