US3309194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of alloys
Assignee: Westinghouse Electric Corp
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Filing: 1964-12-24
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Granted: 1967-03-14
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Expires: 1984-12-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward J Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:12
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/06; C22; C22B; C22B23/00; C22B23/02; C22B23/023; C22C; C22C1/00; C22C1/02; C22C1/023; C22C19/00; C22C38/00; C22C38/08; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A PROCESS FOR PRODUCING AN ALLOY HAVING LOW SULFUR, OXYGEN AND CARBON CONTENT WHEREIN THE ALLOY IS SELECTED FROM THE GROUP CONSISTING OF IRON-BASE AND NICKELBASE ALLOYS, THE STEPS COMPRISING ADDING TO THE MOLTEN ALLOY FROM 0.5% TO 2%, BY WEIGHT, OF CALCIUM, WHEREBY CALCIUM COMPOUNDS OF SULFUR AND OXYGEN ARE FORMED AND PERMITTED TO SEGREGATE AND THUS EFFECT A REDUCTION IN THE SULFUR AND OXYGEN CONTENT OF THE MOLTEN ALLOY, LOWERING THE TEMPERATURE OF THE ALLOY TO BELOW ABOUT 1755*K., BUT ABOVE THE MELTING POINT OF THE ALLOY, WHILE FREE CALCIUM IS PRESENT IN THE ALLOY AND INTRODUCING OXYGEN INTO SAID ALLOY WHILE AT SAID TEMPERATURE WHEREBY A REACTION BETWEEN THE CALCIUM, CARBON AND OXYGEN OCCURS AND RESULTS IN THE REDUCTION OF THE CARBON CONTENT OF THE ALLOY, AND SEPARATING AND REMOVING FREE CALCIUM AND CALCIUM COMPOUNDS FROM THE MOLTEN ALLOY.
Claim 2
Dependent Claim
143 words
IN A PROCESS FOR PRODUCING AN ALLOY HAVING LOW SULFUR, OXYGEN AND CARBON CONTENT WHEREIN THE ALLOY IS SELECTED FROM THE GROUP CONSISTING OF IRON-BASE AND NICKELBASE ALLOYS, THE STEPS COMPRISING ADDING TO THE MOLTEN ALLOY FROM 0.5% TO 2%, BY WEIGHT, OF CALCIUM, WHEREBY CALCIUM COMPOUNDS OF SULFUR AND OXYGEN ARE FORMED AND PERMITTED TO SEGREGATE AND THUS EFFECT A REDUCTION IN THE SULFUR AND OXYGEN CONTENT OF THE MOLTEN ALLOY, LOWERING THE TEMPERATURE OF THE ALLOY TO BELOW ABOUT 1755*K., BUT ABOVE THE MELTING POINT OF THE ALLOY, WHILE FREE CALCIUM IS PRESENT IN THE ALLOY AND INTRODUCING OXYGEN INTO SAID ALLOY WHILE AT SAID TEMPERATURE WHEREBY A REACTION BETWEEN THE CALCIUM, CARBON AND OXYGEN OCCURS AND RESULTS IN THE REDUCTION OF THE CARBON CONTENT OF THE ALLOY, AND SEPARATING AND REMOVING FREE CALCIUM AND CALCIUM COMPOUNDS FROM THE MOLTEN ALLOY.
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |