US3215423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Degassing system for metal alloy furnace
Assignee: Pennwalt Corp
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Filing: 1962-08-01
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Granted: 1965-11-02
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Expires: 1982-08-01
Abstract
No abstract record available.
Inventors
- 👤 Kendrick C Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:39
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
A METHOD OF FORMING A METAL ALLOY COMPRISING THE STEPS OF HEATING METAL IN A FURNACE TO FORM A MOLTEN METAL BATH, LIFTING METAL FROM BELOW THE SURFACE OF THE METAL BATH INTO A BACUUM CHAMBER, FEEDING ALOY AGENTS INTO THE MOLTEN METAL TO FORM AN ALLOY WITH THE MOLTEN METAL, RETURNING THE METAL FROM THE VACUUM CHAMBER TO A POINT BELOW THE SURFACE OF THE METAL BATH, AND EFFECTING SAID LIFTING AND RETURNING STEPS IN A CONTINUOUS METAL FLOWING CYCLE, SAID LIFTING STEP INCLUDING THE STEP OF FORCING AN ACTIVE GAS THROUGH THE METAL TO ACT ON THE METAL, AND STOPPING THE FORCING OF THE ACTIVE GAS THROUGH THE METAL PRIOR TO THE STEP OF FEEDING THE ALLOY AGENTS INTO THE METAL AND FORCING AN INERT GAS THROUGH THE METAL DURING THE ALLOY FEEDING STEP.
Claim 2
Independent Claim
136 words
A METHOD OF FORMING A METAL ALLOY COMPRISING THE STEPS OF HEATING METAL IN A FURNACE TO FORM A MOLTEN METAL BATH, LIFTING METAL FROM BELOW THE SURFACE OF THE METAL BATH INTO A BACUUM CHAMBER, FEEDING ALOY AGENTS INTO THE MOLTEN METAL TO FORM AN ALLOY WITH THE MOLTEN METAL, RETURNING THE METAL FROM THE VACUUM CHAMBER TO A POINT BELOW THE SURFACE OF THE METAL BATH, AND EFFECTING SAID LIFTING AND RETURNING STEPS IN A CONTINUOUS METAL FLOWING CYCLE, SAID LIFTING STEP INCLUDING THE STEP OF FORCING AN ACTIVE GAS THROUGH THE METAL TO ACT ON THE METAL, AND STOPPING THE FORCING OF THE ACTIVE GAS THROUGH THE METAL PRIOR TO THE STEP OF FEEDING THE ALLOY AGENTS INTO THE METAL AND FORCING AN INERT GAS THROUGH THE METAL DURING THE ALLOY FEEDING STEP.
Claim 3
Dependent Claim
94 words
A METAL FURNACE COMPRISING A HEARTH FOR RECEIVING METAL TO BE HEATED, HEATING MEANS FOR HEATING METAL IN THE HEARTH, A VACUUM DEGASSING CHAMBER SPACED FROM AND HIGHER THAN ANY METAL IN THE HEARTH, VACUUM DEGASSING MEANS FOR CIRCULATING METAL FROM SAID HEARTH THROUGH SAID CHAMBER AND BACK TO SAID HEARTH FOR DEGASSING THE METAL, A ROOF MOUNTED ON SAID HEARTH, SAID CHAMBER BEING MOUNTED ON SAID ROOF, SAID VACUUM DEGASSING MEANS INCLUDING A VACUUM PUMP MOUNTED EXTERIOR FROM SAID HEARTH AND ROOF, AND FLEXIBLE CONDUIT MEANS CONNECTING SAID VACUUM PUMP TO SAID CHAMBER.
Claim 4
Dependent Claim
94 words
A METAL FURNACE COMPRISING A HEARTH FOR RECEIVING METAL TO BE HEATED, HEATING MEANS FOR HEATING METAL IN THE HEARTH, A VACUUM DEGASSING CHAMBER SPACED FROM AND HIGHER THAN ANY METAL IN THE HEARTH, VACUUM DEGASSING MEANS FOR CIRCULATING METAL FROM SAID HEARTH THROUGH SAID CHAMBER AND BACK TO SAID HEARTH FOR DEGASSING THE METAL, A ROOF MOUNTED ON SAID HEARTH, SAID CHAMBER BEING MOUNTED ON SAID ROOF, SAID VACUUM DEGASSING MEANS INCLUDING A VACUUM PUMP MOUNTED EXTERIOR FROM SAID HEARTH AND ROOF, AND FLEXIBLE CONDUIT MEANS CONNECTING SAID VACUUM PUMP TO SAID CHAMBER.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |