US3052638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of recalcined zinc sulfide phosphors
Assignee: EIDP Inc
•
Filing: 1958-12-18
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Granted: 1962-09-04
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Expires: 1978-12-18
Abstract
No abstract record available.
Inventors
- 👤 Wayrynen Robert Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:38
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/58; C09K11/582; C09K11/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN A METHOD FOR IMPROVING THE PROPERTIES OF ZINC SULFIDE PHOSPHOR PARTICLES ACTIVATED WITH A METAL SELECTED FROM THE GROUP CONSISTING OF SILVER, COPPER AND MANGANESE, HAVING BEEN PREVIOUSLY CALCINED IN THE PRESENCE OF A HALIDE FLUX, THE STEPS WHICH COMPRISE WASHING THE PHOSPHOR PARTICLES FREE OF SAID FLUX WITH WATER AND RECALCINING THE WASHED PHOSPHORS AT A TEMPERATURE FROM 500* C, TO 1300* C, FOR A PERIOD OF FROM 2 TO 1200 MINUTES.
Claim 2
Dependent Claim
74 words
IN A METHOD FOR IMPROVING THE PROPERTIES OF ZINC SULFIDE PHOSPHOR PARTICLES ACTIVATED WITH A METAL SELECTED FROM THE GROUP CONSISTING OF SILVER, COPPER AND MANGANESE, HAVING BEEN PREVIOUSLY CALCINED IN THE PRESENCE OF A HALIDE FLUX, THE STEPS WHICH COMPRISE WASHING THE PHOSPHOR PARTICLES FREE OF SAID FLUX WITH WATER AND RECALCINING THE WASHED PHOSPHORS AT A TEMPERATURE FROM 500* C, TO 1300* C, FOR A PERIOD OF FROM 2 TO 1200 MINUTES.
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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) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |