US2734872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
US2734872A - - Google Patents
Assignee: —
•
Filing: —
•
Granted: 1956-02-14
•
Expires: 1973-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:38
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/0805; C09K11/0811
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE METHOD OF PRODUCING A LUMINESCENT MATERIAL WHICH COMPRISES PREPARING A MIXTURE CONSISTING OF A COMPOUND SELECTED FROM THE GROUP CONNSISTING OF ZINC OXIDE AND CADMIUM OXIDE AND AN ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF MANGANESE AND SILVER, HEATING THE MIXTURE TO A TEMPERATURE BETWEEN 500 DEG. C. AND 900 DEG. C. FOR A PERIOD TO TIME IN EXCESS OF ONE-HALF HOUR, AND CONTACTING SAID MIXTURE WITH A GAS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN SULFIDE AND HYDROGEN SELENIDE DURING THE TEMPERATURE TREATMENT.
Claim 2
Independent Claim
85 words
THE METHOD OF PRODUCING A LUMINESCENT MATERIAL WHICH COMPRISES PREPARING A MIXTURE CONSISTING OF A COMPOUND SELECTED FROM THE GROUP CONNSISTING OF ZINC OXIDE AND CADMIUM OXIDE AND AN ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF MANGANESE AND SILVER, HEATING THE MIXTURE TO A TEMPERATURE BETWEEN 500 DEG. C. AND 900 DEG. C. FOR A PERIOD TO TIME IN EXCESS OF ONE-HALF HOUR, AND CONTACTING SAID MIXTURE WITH A GAS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN SULFIDE AND HYDROGEN SELENIDE DURING THE TEMPERATURE TREATMENT.
References Cited (Backward Citations)
US1560380A
Cited
US2218750A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-13 | 1959-08-15 | 1960-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-13 | 1963-08-15 | 1964-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-13 | 1967-08-15 | 1968-02-14 | $7700.00 | Window Closed / Lapsed |