Patent US3842012A successfully refreshed from Google Patents.
US3842012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing an oxide of yttrium and/or lanthanum and/or the lanthanides
Assignee: US Philips Corp
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Filing: 1972-12-14
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Granted: 1974-10-15
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Expires: 1992-12-14
Abstract
Abstract 1. A METHOD OF PREPARING A MONOCRYSTALLINE OXIDE OF INCREASED PARTICLE SIZE OF AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF YTTRIUM, LANTHANUM AND THE LANTHANIDES COMPRISING PREPARING A MIXTURE OF A POLYCRYSTALLINE POWDER OF AT LEAST ONE OF SAID OXIDES AND FROM 0.1 TO 2 MOL PER MOL OF SAID OXIDES OF AT LEAST ONE CARBONATE OF AN ALKALI METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, RUBIDIUM AND CESIUM AND HEATING SAID MIXTURE AT A TEMPERATURE OF ABOUT 1000*C. TO 1400*C.
Inventors
- 👤 J Hoppenbrouwers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:50
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7766; C09K11/7767; C09K11/7769
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A METHOD OF PREPARING A MONOCRYSTALLINE OXIDE OF INCREASED PARTICLE SIZE OF AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF YTTRIUM, LANTHANUM AND THE LANTHANIDES COMPRISING PREPARING A MIXTURE OF A POLYCRYSTALLINE POWDER OF AT LEAST ONE OF SAID OXIDES AND FROM 0.1 TO 2 MOL PER MOL OF SAID OXIDES OF AT LEAST ONE CARBONATE OF AN ALKALI METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, RUBIDIUM AND CESIUM AND HEATING SAID MIXTURE AT A TEMPERATURE OF ABOUT 1000*C. TO 1400*C.
Claim 2
Independent Claim
85 words
A METHOD OF PREPARING A MONOCRYSTALLINE OXIDE OF INCREASED PARTICLE SIZE OF AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF YTTRIUM, LANTHANUM AND THE LANTHANIDES COMPRISING PREPARING A MIXTURE OF A POLYCRYSTALLINE POWDER OF AT LEAST ONE OF SAID OXIDES AND FROM 0.1 TO 2 MOL PER MOL OF SAID OXIDES OF AT LEAST ONE CARBONATE OF AN ALKALI METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, RUBIDIUM AND CESIUM AND HEATING SAID MIXTURE AT A TEMPERATURE OF ABOUT 1000*C. TO 1400*C.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |