Patent US3239204A successfully refreshed from Google Patents.
US3239204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum degassing apparatus
Assignee: Pennwalt Corp
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Filing: 1963-02-05
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Granted: 1966-03-08
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Expires: 1983-02-05
Abstract
No abstract record available.
Inventors
- 👤 Allan E Hokanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:06
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
APPARATUS FOR DEGASSING ALLOY STEEL COMPRISING A VACUUM CHAMBER HAVING A REMOVABLE COVER, A NONMAGNETIC LADLE SUPPORT WITHIN SAID CHAMBER FOR RECEIVING AND SUPPORTING A LADLE, SAID SUPPORT HAVING A CENTRAL CAVITY OF SUFFICIENT DEPTH SO AS TO RECEIVE THEREIN SUBSTANTIALLY THE ENTIRE BODY OF A LADLE, SAID SUPPORT HAVING COILS MOUNTED TEREON FOR SURROUNDING A LADLE WHEN SUCH LADLE IS DISPOSED WITHIN SAID CAVITY, SAID COILS BEING ADAPTED TO BE CONNECTED TO A SOURCE OF LOW FREQUENCE ALTERNATING CURRENT FOR STIRRING MOLTEN METAL IN A LADLE, A HEAT SHIELD, MEANS SUPPORTING SAID HEAT SHIELD BETWEEN SAID COVER AND SAID SUPPORT, SAID HEAT SHIELD HAVING A REFRACTORY SURFACE JUXTAPOSED TO THE SUPPORT SO THAT HEAT WILL NOT BE ABSORBED FROM MOLTEN METAL WITHIN A LADLE ON SAID SUPPORT.
Claim 2
Dependent Claim
128 words
APPARATUS FOR DEGASSING ALLOY STEEL COMPRISING A VACUUM CHAMBER HAVING A REMOVABLE COVER, A NONMAGNETIC LADLE SUPPORT WITHIN SAID CHAMBER FOR RECEIVING AND SUPPORTING A LADLE, SAID SUPPORT HAVING A CENTRAL CAVITY OF SUFFICIENT DEPTH SO AS TO RECEIVE THEREIN SUBSTANTIALLY THE ENTIRE BODY OF A LADLE, SAID SUPPORT HAVING COILS MOUNTED TEREON FOR SURROUNDING A LADLE WHEN SUCH LADLE IS DISPOSED WITHIN SAID CAVITY, SAID COILS BEING ADAPTED TO BE CONNECTED TO A SOURCE OF LOW FREQUENCE ALTERNATING CURRENT FOR STIRRING MOLTEN METAL IN A LADLE, A HEAT SHIELD, MEANS SUPPORTING SAID HEAT SHIELD BETWEEN SAID COVER AND SAID SUPPORT, SAID HEAT SHIELD HAVING A REFRACTORY SURFACE JUXTAPOSED TO THE SUPPORT SO THAT HEAT WILL NOT BE ABSORBED FROM MOLTEN METAL WITHIN A LADLE ON SAID SUPPORT.
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |