US2939786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing titanium and titanium alloys
Assignee: Vereinigte Aluminium Werke AG
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Filing: 1956-07-30
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Granted: 1960-06-07
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Expires: 1976-07-30
Abstract
No abstract record available.
Inventors
- 👤 Ginsberg Hans
- 👤 Wilde Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:08
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1204; C22B34/1263; C22B34/1277; C22C; C22C14/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
IN A METHOD OF SEPARATING TITANIUM DIOXIDE FROM IRON IN A RAW MATERIAL CONTAINING TITANIUM DIOXIDE AND AT LEAST ONE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF METALLIC IRON AND IRON COMPOUNDS THE STEPS OF FORMING A MIXTURE OF A PREDETERMINED QUANTITY OF CRYOLITE AND SAID RAW MATERIAL AT A PREDETERMINED TEMPERATURE ABOVE THE MELTING POINT OF SAID CRYOLITE SO AS TO MELT THE SAME, SAID PREDETERMINED QUANTITY OF CRYOLITE IN RELATION TO THE QUANTITY OF TITANIUM DIOXIDE IN SAID RAW MATERIAL, AND SAID PREDETERMINED TEMPERATURE OF SAID MOLTEN MIXTURE BEING CHOSEN IN SUCH A MANNER AS TO SUBSTANTIALLY COMPLETELY DISSOLVE ALL OF SAID TITANIUM DIOXIDE OF SAID RAW MATERIAL IN SAID MOLTEN CRYOLITE, WHILE SAID SUBSTANCE DOES NOT DISSOLVE IN THE THUS-FORMED SOLUTION, AND SEPARATING SAID IRON-FREE, TITANIUM-DIOXIDE CONTAINING SOLUTION FROM THE REMAINDER OF SAID MIXTURE.
Claim 2
Dependent Claim
137 words
IN A METHOD OF SEPARATING TITANIUM DIOXIDE FROM IRON IN A RAW MATERIAL CONTAINING TITANIUM DIOXIDE AND AT LEAST ONE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF METALLIC IRON AND IRON COMPOUNDS THE STEPS OF FORMING A MIXTURE OF A PREDETERMINED QUANTITY OF CRYOLITE AND SAID RAW MATERIAL AT A PREDETERMINED TEMPERATURE ABOVE THE MELTING POINT OF SAID CRYOLITE SO AS TO MELT THE SAME, SAID PREDETERMINED QUANTITY OF CRYOLITE IN RELATION TO THE QUANTITY OF TITANIUM DIOXIDE IN SAID RAW MATERIAL, AND SAID PREDETERMINED TEMPERATURE OF SAID MOLTEN MIXTURE BEING CHOSEN IN SUCH A MANNER AS TO SUBSTANTIALLY COMPLETELY DISSOLVE ALL OF SAID TITANIUM DIOXIDE OF SAID RAW MATERIAL IN SAID MOLTEN CRYOLITE, WHILE SAID SUBSTANCE DOES NOT DISSOLVE IN THE THUS-FORMED SOLUTION, AND SEPARATING SAID IRON-FREE, TITANIUM-DIOXIDE CONTAINING SOLUTION FROM THE REMAINDER OF SAID MIXTURE.
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) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |