US2628201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc-magnesium oxide luminescent materials and methods of making same
Assignee: RCA Corp
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Filing: 1949-07-29
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Granted: 1953-02-10
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Expires: 1969-07-29
Abstract
No abstract record available.
Inventors
- 👤 Arthur L J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:46
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/55
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A LUMINESCENT MATERIAL AS PREPARED BY A PROCESS COMPRISING PREPARING A MIXTURE OF ZINC OXIDE AND MAGNESIUM OXIDE IN WHICH THE PROPORTION BY WEIGHT OF SAID MAGNESIUM OXIDE IS 1-50 MOL PER CENT, FIRING THE MIXTURE AT A TEMPERATURE OF 907* C. TO 1300* C. IN A REDUCING ATMOSPHERE, AND THEN IMMEDIATELY COOLING THE MATERIAL IN A NON-OXIDIZING ATMOSPHERE.
Claim 2
Dependent Claim
59 words
A LUMINESCENT MATERIAL AS PREPARED BY A PROCESS COMPRISING PREPARING A MIXTURE OF ZINC OXIDE AND MAGNESIUM OXIDE IN WHICH THE PROPORTION BY WEIGHT OF SAID MAGNESIUM OXIDE IS 1-50 MOL PER CENT, FIRING THE MIXTURE AT A TEMPERATURE OF 907* C. TO 1300* C. IN A REDUCING ATMOSPHERE, AND THEN IMMEDIATELY COOLING THE MATERIAL IN A NON-OXIDIZING ATMOSPHERE.
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) | 1956-02-10 | 1956-08-11 | 1957-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-10 | 1960-08-11 | 1961-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-10 | 1964-08-11 | 1965-02-10 | $7700.00 | Window Closed / Lapsed |