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Patent US3514267A successfully refreshed from Google Patents.
US3514267A
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Batch separator of yttrium and rare earths under total reflux
Assignee: Thorium Ltd
•
Filing: 1967-02-02
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Granted: 1970-05-26
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Expires: 1987-02-02
Abstract
No abstract record available.
Inventors
- 👤 Leonard George Sherrington
- 👤 William Palmer Kemp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:43
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/01; C01; C01F; C01F17/00; C01F17/10; C01F17/17; C01F17/20; C01F17/253; C01F17/271; C01F17/276; Y; Y02; Y02W; Y02W30/00; Y02W30/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2955913A
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US2798789A
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US3387944A
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US3251646A
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US3328116A
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FR1382467A
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US3323857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |