Patent US3047512A successfully refreshed from Google Patents.
US3047512A
Expired / Lapsed
US
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Halophosphate phosphor treatment process
Assignee: General Electric Co
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Filing: 1960-02-29
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Granted: 1962-07-31
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Expires: 1980-02-29
Abstract
No abstract record available.
Inventors
- 👤 William C Martyny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:07
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/70; C09K11/72; C09K11/73; C09K11/0855; C09K11/0861; C09K11/0866
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR IMPROVING THE BRIGHTNESS AND MAINTENANCE OF ALKALINE EARTH HALOPHOSPHATE PHOSPHORS WHICH COMPRISES THROUGHLY AGITATING THE PHOSPHOR IN AN AMMONIACAL SOLUTION OF ETHYLENEDIAMINE TETRAACETIC ACID CONTAINING AT LEAST 3% BY WEIGHT OF ETHYLENEDIAMINE TETRAACETIC ACID RELATIVE TO WEIGHT OF PHOSPHOR, SEPARATING THE PHOSPHOR FROM THE LIQUID, AND RINSING THE PHOSPHOR TO REMOVE RESIDUAL ETHYLENEDIAMINE TETRAACETIC ACID.
Claim 2
Dependent Claim
58 words
A PROCESS FOR IMPROVING THE BRIGHTNESS AND MAINTENANCE OF ALKALINE EARTH HALOPHOSPHATE PHOSPHORS WHICH COMPRISES THROUGHLY AGITATING THE PHOSPHOR IN AN AMMONIACAL SOLUTION OF ETHYLENEDIAMINE TETRAACETIC ACID CONTAINING AT LEAST 3% BY WEIGHT OF ETHYLENEDIAMINE TETRAACETIC ACID RELATIVE TO WEIGHT OF PHOSPHOR, SEPARATING THE PHOSPHOR FROM THE LIQUID, AND RINSING THE PHOSPHOR TO REMOVE RESIDUAL ETHYLENEDIAMINE TETRAACETIC ACID.
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) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |