US3482932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating yttrium from the lanthanide elements
Assignee: GTE Sylvania Inc
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Filing: 1968-02-05
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Granted: 1969-12-09
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Expires: 1988-02-05
Abstract
No abstract record available.
Inventors
- 👤 J R Gump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:24
CPC Classifications
C; C01; C01F; C01F17/00; C01F17/10; C01F17/13; C01F17/17
Claims Analysis
Total Claims: 0
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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) | 1972-12-08 | 1973-06-09 | 1973-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-08 | 1977-06-09 | 1977-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-08 | 1981-06-09 | 1981-12-09 | $7700.00 | Window Closed / Lapsed |