US2707679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of producing zirconium and titanium
Assignee: Westinghouse Electric Corp
•
Filing: 1951-01-04
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Granted: 1955-05-03
•
Expires: 1971-01-04
Abstract
No abstract record available.
Inventors
- 👤 William C Lilliendahl
- 👤 Gregory Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:15
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1263; C22B34/1268; C22B34/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
THE METHOD OF PRODUCING METAL SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM AND TITANIUM, COMPRISING MIXING AN OXIDE OF THE SELECTED METAL REDUCING MATERIAL SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM METAL AND ALLOYS THEREOF WITH CALCIUM, IN THE PROPORTION OF NOT MORE THAN 18% OF CALCIUM, WHICH MATERIALS ARE SUBSTANTIALLY NITROGEN-FREE, USING THE SELECTED REDUCING MATERIAL IN EXCESS OF THE THEORETICALLY NEEDED TO EFFECT COMPLETE REDUCTION, HEATING THE REDUCING MATERIAL IN INERT GAS TO A TEMPERATURE BETWEEN 100* C. AND 1100* C., FOR A PERIOD OF TIME SUFFICIENT TO MELT THE REDUCING MATERIAL, TO CAUSE IT TO REACT WITH SAID OXIDE TO EFFECT A PARTIAL REDUCTION, COOLING THE MIXTURE, LEACHING, DRYING THE PARTIALLY REDUCED OXIDE, MIXING IT WITH REDUCING MATERIAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM MATAL AND ALLOYS THEREOF WITH MAGNESIUM IN THE PROPORTION OF NOT MORE THAN 21 1/2% OF MAGNESIUM, WHICH MATERIALS
Claim 2
Independent Claim
147 words
THE METHOD OF PRODUCING METAL SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM AND TITANIUM, COMPRISING MIXING AN OXIDE OF THE SELECTED METAL REDUCING MATERIAL SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM METAL AND ALLOYS THEREOF WITH CALCIUM, IN THE PROPORTION OF NOT MORE THAN 18% OF CALCIUM, WHICH MATERIALS ARE SUBSTANTIALLY NITROGEN-FREE, USING THE SELECTED REDUCING MATERIAL IN EXCESS OF THE THEORETICALLY NEEDED TO EFFECT COMPLETE REDUCTION, HEATING THE REDUCING MATERIAL IN INERT GAS TO A TEMPERATURE BETWEEN 100* C. AND 1100* C., FOR A PERIOD OF TIME SUFFICIENT TO MELT THE REDUCING MATERIAL, TO CAUSE IT TO REACT WITH SAID OXIDE TO EFFECT A PARTIAL REDUCTION, COOLING THE MIXTURE, LEACHING, DRYING THE PARTIALLY REDUCED OXIDE, MIXING IT WITH REDUCING MATERIAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM MATAL AND ALLOYS THEREOF WITH MAGNESIUM IN THE PROPORTION OF NOT MORE THAN 21 1/2% OF MAGNESIUM, WHICH MATERIALS
References Cited (Backward Citations)
US1659209A
Cited
US648439A
Cited
US1533505A
Cited
GB230865A
Cited
US1814719A
Cited
GB253161A
Cited
US1814073A
Cited
US1738669A
Cited
GB358531A
Cited
US1847555A
Cited
US2446062A
Cited
US2425705A
Cited
US2482127A
Cited
US2537068A
Cited
US2564337A
Cited
US2546320A
Cited
US2551341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-02 | 1958-11-01 | 1959-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-02 | 1962-11-01 | 1963-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-02 | 1966-11-01 | 1967-05-03 | $7700.00 | Window Closed / Lapsed |