US3159584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper activated alkaline earth metalalkali metal orthophosphate luminescent material
Assignee: US Philips Corp
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Filing: 1961-07-28
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Granted: 1964-12-01
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Expires: 1981-07-28
Abstract
No abstract record available.
Inventors
- 👤 Wanmaker Willem Lambertus
- 👤 Bakker Cornelis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:14
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/70; C09K11/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A COPPER ACTIVATED ALKALINE EARTH METAL ORTHOPHOSPHATE LUMINESCENT MATERIAL, SAID LUMINESCENT MATERIAL CONTAINING AT LEAST ONE ALKALI METAL OF THE GROUP CONSISTING OF LITHIUM, SODIUM AND POTASSIUM AND HAVING A STRUCTURE SATISFYING THE FORMULA:
Claim 2
Dependent Claim
34 words
A COPPER ACTIVATED ALKALINE EARTH METAL ORTHOPHOSPHATE LUMINESCENT MATERIAL, SAID LUMINESCENT MATERIAL CONTAINING AT LEAST ONE ALKALI METAL OF THE GROUP CONSISTING OF LITHIUM, SODIUM AND POTASSIUM AND HAVING A STRUCTURE SATISFYING THE FORMULA:
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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |