US2730504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tin activated barium phosphate phosphor
Assignee: General Electric Co
•
Filing: 1951-10-09
•
Granted: 1956-01-10
•
Expires: 1971-10-09
Abstract
No abstract record available.
Inventors
- 👤 Alfred H Mckeag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:24
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/70; C09K11/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
THE METHOD OF MANUFACTURING A RED-FLUORESCING PHOSPHATE OF BARIUM ACTIVATED BY TIN WHICH COMPRISES FORMING A MIXTURE OF BARIUM HYDROGEN PHOSPHATE AND AN ACTIVATING TIN COMPOUND IN AN AMOUNT SUCH AS TO GIVE ABOUT 2% BY WEIGHT OF TIN IN THE FINAL PRODUCT, AND FIRING THE MIXTURE IN SUCCESSIVE STEPS IN AIR AT ABOUT 900* C. FOR ABOUT TWO HOURS, IN HYDROGEN AT ABOUT 800* C. FOR ABOUT ONE HOUR AND AGAIN IN AIR AT ABOUT 900* C. FOR ABOUT ONE HOUR.
Claim 2
Independent Claim
82 words
THE METHOD OF MANUFACTURING A RED-FLUORESCING PHOSPHATE OF BARIUM ACTIVATED BY TIN WHICH COMPRISES FORMING A MIXTURE OF BARIUM HYDROGEN PHOSPHATE AND AN ACTIVATING TIN COMPOUND IN AN AMOUNT SUCH AS TO GIVE ABOUT 2% BY WEIGHT OF TIN IN THE FINAL PRODUCT, AND FIRING THE MIXTURE IN SUCCESSIVE STEPS IN AIR AT ABOUT 900* C. FOR ABOUT TWO HOURS, IN HYDROGEN AT ABOUT 800* C. FOR ABOUT ONE HOUR AND AGAIN IN AIR AT ABOUT 900* C. FOR ABOUT ONE HOUR.
References Cited (Backward Citations)
US2270124A
Cited
GB578272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |