Patent US2950581A successfully refreshed from Google Patents.
Patent US3150964A successfully refreshed from Google Patents.
US3150964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of yttrium metal
Assignee: Individual
•
Filing: 1963-08-09
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Granted: 1964-09-29
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Expires: 1983-08-09
Abstract
No abstract record available.
Inventors
- 👤 Carlson Oscar Norman
- 👤 Frederick A Schmidt
- 👤 Joseph A Haefling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:58
CPC Classifications
C; C22; C22B; C22B59/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS OF REMOVING IMPURITIES FROM CRUDE YTRIUM METAL, COMPRISING DISSOLVEING SAID YTTRIUM METAL IN MOLTEN MAGNESIUM CHLORIDE, WHEREBY YTTRIUM CHLORIDE AND MAGNESIUM ARE FORMED; PROVIDING IN THE MOLTEN MASS OBTAINED A CONTENT OF CRUDE YTTRIUM METAL TO BE PURIFIED, WHEREBY IMPURITIES OF SAID YTTRIUM METAL ARE EXTRACTED INTO THE YTTRIUM CHLORIDE FORMED AND PURIFIED YTTRIUM IS OBTAINED AND ALLOYED WITH SAID MAGNESIUM; SEPARATING THE YTTRIUM CHLORIDE FROM THE YTTRIUM-MAGNESIUM ALLOY; AND HEATING THE YTRRIUM-MAGNESIUM ALLOY, WHEREBY MAGNESIUM IS VOLATILIZED AND PURIFIED YTTRIUM IS OBTAINED.
Claim 2
Dependent Claim
85 words
A PROCESS OF REMOVING IMPURITIES FROM CRUDE YTRIUM METAL, COMPRISING DISSOLVEING SAID YTTRIUM METAL IN MOLTEN MAGNESIUM CHLORIDE, WHEREBY YTTRIUM CHLORIDE AND MAGNESIUM ARE FORMED; PROVIDING IN THE MOLTEN MASS OBTAINED A CONTENT OF CRUDE YTTRIUM METAL TO BE PURIFIED, WHEREBY IMPURITIES OF SAID YTTRIUM METAL ARE EXTRACTED INTO THE YTTRIUM CHLORIDE FORMED AND PURIFIED YTTRIUM IS OBTAINED AND ALLOYED WITH SAID MAGNESIUM; SEPARATING THE YTTRIUM CHLORIDE FROM THE YTTRIUM-MAGNESIUM ALLOY; AND HEATING THE YTRRIUM-MAGNESIUM ALLOY, WHEREBY MAGNESIUM IS VOLATILIZED AND PURIFIED YTTRIUM IS OBTAINED.
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) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |