Patent US2513602A successfully refreshed from Google Patents.
US2513602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exothermic composition for use in molds for casting molten metal
Assignee: Guaranty Investment Corp Ltd
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Filing: 1947-08-29
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Granted: 1950-07-04
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Expires: 1967-08-29
Abstract
No abstract record available.
Inventors
- 👤 Marvin J Udy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:42
CPC Classifications
B; B22; B22D; B22D27/00; B22D27/04; B22D27/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
AN EXOTHERMIC REACTION MIXTURE SUITABLE FOR USE IN PROVIDING SLAG LAYERS ON THE SURFACES OF MOLTEN METALS IN CASTING MOLDS AND INGOT MOLDS TO INHIBIT OR REDUCE PIPING, COMPRISING FINELY DIVIDED IRON OXIDE, SODIUM NITRATE, FINELY DIVIDED CARBON AND NON-CARBONACEOUS REDUCING MATERIAL AND RELATIVELY COARSE HEAT-ABSORBING MATERIAL, THE IRON OXIDE, SODIUM NITRATE AND NON-CARBONACEOUS REDUCING MATERIAL BEING PRESENT IN SUCH QUANTITIES AND BEING SO PROPORTIONED AS TO BE CAPABLE UPON IGNITION OF THE REACTION MIXTURE OF REACTING EXOTHERMICALLY TO PRODUCE MOLTEN SLAG, THE HEAT-ABSORBING MATERIAL BEING PRESENT IN AMOUNT SUFFICIENT TO THICKEN THE SLAG AND THE FINELY DIVIDED CARBON BEING PRESENT IN AMOUNT SUFFICIENT TO REACT WITH A PORTION OF THE SODIUM NITRATE TO GENERATE HEAT AND CAUSE THE REACTION MIXTURE TO IGNITE AND BURN READILY.
Claim 2
Dependent Claim
126 words
AN EXOTHERMIC REACTION MIXTURE SUITABLE FOR USE IN PROVIDING SLAG LAYERS ON THE SURFACES OF MOLTEN METALS IN CASTING MOLDS AND INGOT MOLDS TO INHIBIT OR REDUCE PIPING, COMPRISING FINELY DIVIDED IRON OXIDE, SODIUM NITRATE, FINELY DIVIDED CARBON AND NON-CARBONACEOUS REDUCING MATERIAL AND RELATIVELY COARSE HEAT-ABSORBING MATERIAL, THE IRON OXIDE, SODIUM NITRATE AND NON-CARBONACEOUS REDUCING MATERIAL BEING PRESENT IN SUCH QUANTITIES AND BEING SO PROPORTIONED AS TO BE CAPABLE UPON IGNITION OF THE REACTION MIXTURE OF REACTING EXOTHERMICALLY TO PRODUCE MOLTEN SLAG, THE HEAT-ABSORBING MATERIAL BEING PRESENT IN AMOUNT SUFFICIENT TO THICKEN THE SLAG AND THE FINELY DIVIDED CARBON BEING PRESENT IN AMOUNT SUFFICIENT TO REACT WITH A PORTION OF THE SODIUM NITRATE TO GENERATE HEAT AND CAUSE THE REACTION MIXTURE TO IGNITE AND BURN READILY.
References Cited (Backward Citations)
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Cited
US2243784A
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US2276671A
Cited
US2243786A
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US2247262A
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US2294169A
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US2426849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |