US3408302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thoria/terbium fluoride luminophors
Assignee: EIDP Inc
•
Filing: 1965-05-24
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Granted: 1968-10-29
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Expires: 1985-05-24
Abstract
No abstract record available.
Inventors
- 👤 Hans J Borchardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:32
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7743; C09K11/7744; C09K11/7747
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
25 words
01 AND 0.2, AND A RATIO OF FLUORIDE IONS TO TERBIUM BETWEEN 0.5 AND 100, TO A TEMPERATURE GREATHER THAN 900*C. IN AN INERT 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) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |