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Patent US2688600A successfully refreshed from Google Patents.
US2688600A
Expired / Lapsed
US
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Magnesium arsenate phosphor activated by manganese
Assignee: Hartford National Bank and Trust Co
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Filing: 1950-10-04
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Granted: 1954-09-07
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Expires: 1970-10-04
Abstract
No abstract record available.
Inventors
- 👤 Travnice Milan Maria F Leopold
- 👤 Ouweltjes Jan Lourens
- 👤 Kroger Ferdinand Anne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:11
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A RED LUMINESCING MATERIAL CONSISTING ESSENTIALLY OF THE FIRED REACTION PRODUCT OF MAGNESIUM OXIDE AND ARENIC PENTOXIDE IN THE MOL. RATIO GREATER THAN 3:1 AND LESS THAN 10:1 AND MANGANESE AS AN ACTIVATOR PRESENT IN AN AMOUNT OF ABOUT 0.001 TO 5 ATOM PER CENT WITH RESPECT TO THE MAGNESIUM.
Claim 2
Dependent Claim
50 words
A RED LUMINESCING MATERIAL CONSISTING ESSENTIALLY OF THE FIRED REACTION PRODUCT OF MAGNESIUM OXIDE AND ARENIC PENTOXIDE IN THE MOL. RATIO GREATER THAN 3:1 AND LESS THAN 10:1 AND MANGANESE AS AN ACTIVATOR PRESENT IN AN AMOUNT OF ABOUT 0.001 TO 5 ATOM PER CENT WITH RESPECT TO THE MAGNESIUM.
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) | 1957-09-06 | 1958-03-08 | 1958-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-06 | 1962-03-08 | 1962-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-06 | 1966-03-08 | 1966-09-07 | $7700.00 | Window Closed / Lapsed |