US3184302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process, removal of oxygen and aluminum from metals prepared by aluminothermic and similar processes
Assignee: Individual
•
Filing: 1963-01-24
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Granted: 1965-05-18
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Expires: 1983-01-24
Abstract
No abstract record available.
Inventors
- 👤 Carl J Chindgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:00
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/04; C22B5/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
57 words
A METHOD FOR THE PREPARATION OF A HIGH-PURITY REFRACTORY METAL FROM AN IMPURE REFRACTORY METAL CONTAINING AS IMPURITIES OXYGEN AND A LOW PERCENTAGE OF ALLOYED ALUMINUM COMPRISING REACTING THE IMPURE REFRACTORY METAL WITH BARIUM PEROXIDE, METALLIC CALCIUM AND METALLIC ALUMINUM AND RECOVERING A PRODUCT OF HIGH-PURITY REFRACTORY METAL CONTAINING VERY SMALL AMOUNTS OF OXYGEN AND ALLOYED ALUMINUM.
Claim 2
Independent Claim
57 words
A METHOD FOR THE PREPARATION OF A HIGH-PURITY REFRACTORY METAL FROM AN IMPURE REFRACTORY METAL CONTAINING AS IMPURITIES OXYGEN AND A LOW PERCENTAGE OF ALLOYED ALUMINUM COMPRISING REACTING THE IMPURE REFRACTORY METAL WITH BARIUM PEROXIDE, METALLIC CALCIUM AND METALLIC ALUMINUM AND RECOVERING A PRODUCT OF HIGH-PURITY REFRACTORY METAL CONTAINING VERY SMALL AMOUNTS OF OXYGEN AND ALLOYED ALUMINUM.
Claim 3
Independent Claim
55 words
A METHOD FOR THE PREPARATION OF A HIGH-PURITY REFRACTORY METAL FROM AN IMPURE REFRACTORY METAL CONTAINING AS IMPURITIES OXYGEN AND A HIGH PERCENTAGE OF ALLOYED ALUMINM COMPRISING REACTING THE IMPURE REFRACTORY METAL WITH BARIUM PEROXIDE AND METALLIC CALCIUM AND RECOVERING A PRODUCT OF HIGH-PURITY REFRACTORY METAL CONTAINING VERY SMALL AMOUNTS OF OXYGEN AND ALLOYED ALUMINUM.
Claim 4
Independent Claim
55 words
A METHOD FOR THE PREPARATION OF A HIGH-PURITY REFRACTORY METAL FROM AN IMPURE REFRACTORY METAL CONTAINING AS IMPURITIES OXYGEN AND A HIGH PERCENTAGE OF ALLOYED ALUMINM COMPRISING REACTING THE IMPURE REFRACTORY METAL WITH BARIUM PEROXIDE AND METALLIC CALCIUM AND RECOVERING A PRODUCT OF HIGH-PURITY REFRACTORY METAL CONTAINING VERY SMALL AMOUNTS OF OXYGEN AND ALLOYED ALUMINUM.
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) | 1968-05-17 | 1968-11-16 | 1969-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-17 | 1972-11-16 | 1973-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-17 | 1976-11-16 | 1977-05-18 | $7700.00 | Window Closed / Lapsed |