US2965512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc pyrophosphate treated sulfide phosphors and their preparation
Assignee: EIDP Inc
•
Filing: 1958-10-30
•
Granted: 1960-12-20
•
Expires: 1978-10-30
Abstract
No abstract record available.
Inventors
- 👤 Umberger Jacob Quentin
- 👤 Lofstrom John Gustave
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:55
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/56; C09K11/562; C09K11/565; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A LUMINESCENT MATERIAL COMPRISING A METAL SULFIDE PHOSPHOR COATED WITH FROM 0.1 TO 3 PERCENT OF ZINC PYROPHOSPHATE BASED ON THE WEIGHTED OF THE PHOSPHOR.
Claim 2
Dependent Claim
25 words
A LUMINESCENT MATERIAL COMPRISING A METAL SULFIDE PHOSPHOR COATED WITH FROM 0.1 TO 3 PERCENT OF ZINC PYROPHOSPHATE BASED ON THE WEIGHTED OF THE PHOSPHOR.
References Cited (Backward Citations)
US2252590A
Cited
US2697668A
Cited
US2704726A
Cited
US2743238A
Cited
US2821509A
Cited
US2758941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |