US2898302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indium-activated phosphor
Assignee: GTE Sylvania Inc
•
Filing: 1954-03-31
•
Granted: 1959-08-04
•
Expires: 1974-03-31
Abstract
No abstract record available.
Inventors
- 👤 Keith H Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:25
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/70; C09K11/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A PHOSPHOR CONSISTING ESSENTIALLY OF AN ALKALINE EARTH METAL PHOSPHATE ACTIVATED BY INDIUM IN A STATE OF LOWER VALENCE THAN THREE.
Claim 2
Dependent Claim
21 words
A PHOSPHOR CONSISTING ESSENTIALLY OF AN ALKALINE EARTH METAL PHOSPHATE ACTIVATED BY INDIUM IN A STATE OF LOWER VALENCE THAN THREE.
References Cited (Backward Citations)
US2545880A
Cited
US2676111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |