US2750344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminescent material
Assignee: Hartford National Bank and Trust Co
•
Filing: 1951-11-23
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Granted: 1956-06-12
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Expires: 1971-11-23
Abstract
No abstract record available.
Inventors
- 👤 Kroger Ferdinand Anne
- 👤 Boomgaard Jan Van Den
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:09
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7715; C09K11/7723; C09K11/7724; C09K11/7721
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A CHEMICALLY STABLE LUMINESCENT MATERIAL CONSISTING ESSENTIALLY OF A CRYSTALLINE TERNARY COMPOSITION HAVING A HOMOGENEOUS PHASE CONTAINING ALUMINUM AND REPRE-
Claim 2
Dependent Claim
20 words
A CHEMICALLY STABLE LUMINESCENT MATERIAL CONSISTING ESSENTIALLY OF A CRYSTALLINE TERNARY COMPOSITION HAVING A HOMOGENEOUS PHASE CONTAINING ALUMINUM AND REPRE-
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) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |