US3060129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of increasing the light output of alkaline earth halophosphates
Assignee: US Philips Corp
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Filing: 1960-07-29
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Granted: 1962-10-23
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Expires: 1980-07-29
Abstract
No abstract record available.
Inventors
- 👤 Hoekstra Age Hylke
- 👤 Wanmaker Willem Lambertus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:35
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/74; C09K11/75; C09K11/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A METHOD OF INCREASING THE LIGHT OUTPUT OF ALKALINE EARTH HALOPHOSPHATE ACTIVATED WITH A MEMBER OF THE GROUP CONSISTING OF TRIVALENT ANTIMONY,TRIVALENT ANTIMONY AND BIVALENT MANGANESE, WHEREIN THE ALKALINE EARTH HALOPHOSPHATE IS FIRST WASHED WITH AN AQUEOUS SOLUTION OF AN INORGANIC REDUCING ACID HAVING A PH BETWEEN 0.9. AND 2.0. AND IS THEN SUBJECTED TO A PROCESS FOR REMOVING PARTICLES HAVING A GRAIN SIZE SMALLER THAN APPROXIMATELY 2 MICRONS AND TO A RINSING WITH WATER UNTIL PRACTICALLY NO REDUCING ACID IS PRESENT ANY LONGER IN THE RINSING WATER.
Claim 2
Independent Claim
88 words
A METHOD OF INCREASING THE LIGHT OUTPUT OF ALKALINE EARTH HALOPHOSPHATE ACTIVATED WITH A MEMBER OF THE GROUP CONSISTING OF TRIVALENT ANTIMONY,TRIVALENT ANTIMONY AND BIVALENT MANGANESE, WHEREIN THE ALKALINE EARTH HALOPHOSPHATE IS FIRST WASHED WITH AN AQUEOUS SOLUTION OF AN INORGANIC REDUCING ACID HAVING A PH BETWEEN 0.9. AND 2.0. AND IS THEN SUBJECTED TO A PROCESS FOR REMOVING PARTICLES HAVING A GRAIN SIZE SMALLER THAN APPROXIMATELY 2 MICRONS AND TO A RINSING WITH WATER UNTIL PRACTICALLY NO REDUCING ACID IS PRESENT ANY LONGER IN THE RINSING WATER.
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) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |