US2986529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper activated alkaline earth halo phosphate phosphors
Assignee: The General Electric Company PLC
•
Filing: 1958-03-11
•
Granted: 1961-05-30
•
Expires: 1978-03-11
Abstract
No abstract record available.
Inventors
- 👤 Mckeag Alfred Hamilton
- 👤 Hunt Brian Everard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:25
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/70; C09K11/72; C09K11/73
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
48 words
A CRYSTALLINE INORGANIC PHOSPHOR EXCITABLE TO LUMINESCENCE BY AT LEAST ONE OF THE EXCITING AGENCIES CONSISTING OF ULTRAVIOLET RADIATION OF LONG WAVELENGTH, ULTRAVIOLET RADIATION OF SHORT WAVELENGTH, CATHODE RAYS, X-RAYS, WHICH CONSISTS OF AN ALKALINE EARTH METAL HALOPHOSPHATE INCORPORATING AN ACTIVATING PROPORTION OF COPPER IN THE CUPROUS STATE.
Claim 2
Dependent Claim
48 words
A CRYSTALLINE INORGANIC PHOSPHOR EXCITABLE TO LUMINESCENCE BY AT LEAST ONE OF THE EXCITING AGENCIES CONSISTING OF ULTRAVIOLET RADIATION OF LONG WAVELENGTH, ULTRAVIOLET RADIATION OF SHORT WAVELENGTH, CATHODE RAYS, X-RAYS, WHICH CONSISTS OF AN ALKALINE EARTH METAL HALOPHOSPHATE INCORPORATING AN ACTIVATING PROPORTION OF COPPER IN THE CUPROUS STATE.
Claim 3
Independent Claim
80 words
A METHOD OF MANUFACTURING A PHOSPHOR CONSISTING OF AN ALKALINE EARTH METAL HALOPHOSPHATE ACTIVATED BY COPPER IN THE CUPROUS STATE, WHICH METHOD INCLUDES THE STEPS OF MIXING A STARTING MATERIAL CAPABLE OF PRODUCING THE REQUIRED HALOPHOSPHATE COMPOSITION ON HEATING, WITH AT LEAST ONE COMPOUND OF COPPER, AND HEATING THE MIXTURE SO FORMED AT A TEMPERATURE IN THE RANGE OF 700*C. TO 1250*C. IN AN ATMOSPHERE CONSISTING OF A MIXTURE OF NITROGEN AND HYDROGEN IN A RATIO IN THE RANGE OF
Claim 4
Independent Claim
80 words
A METHOD OF MANUFACTURING A PHOSPHOR CONSISTING OF AN ALKALINE EARTH METAL HALOPHOSPHATE ACTIVATED BY COPPER IN THE CUPROUS STATE, WHICH METHOD INCLUDES THE STEPS OF MIXING A STARTING MATERIAL CAPABLE OF PRODUCING THE REQUIRED HALOPHOSPHATE COMPOSITION ON HEATING, WITH AT LEAST ONE COMPOUND OF COPPER, AND HEATING THE MIXTURE SO FORMED AT A TEMPERATURE IN THE RANGE OF 700*C. TO 1250*C. IN AN ATMOSPHERE CONSISTING OF A MIXTURE OF NITROGEN AND HYDROGEN IN A RATIO IN THE RANGE OF
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |