Patent US2747024A successfully refreshed from Google Patents.
US3300296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a lightweight foamed metal
Assignee: Primerica Inc
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Filing: 1963-07-31
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Granted: 1967-01-24
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Expires: 1983-07-31
Abstract
No abstract record available.
Inventors
- 👤 Hardy Paul Wilson
- 👤 Peisker Glenn William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:42
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/08; C22C1/083; C22C1/10; C22C1/1036; C22C1/1047; C22C32/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12479
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
166 words
A METHOD OF PRODUCING FOAMED METAL WHEREIN GASEOUS BUBBLES ARE RETAINED WITHIN A MASS OF MOLTEN METAL DURING THE FOAMING, COMPRISING THE STEPS OF: HEATING A FUSIBLE METAL AND PARTICLES OF A SILICEOUS NONMETALLIC AGGREGATE ABOVE THE SOLIDUS TEMPERATURE OF SAID METAL, BUT BELOW THE LIQUIDUS TEMPERATURE OF SAID METAL, WHEREBY SAID SOLID AGGREGATE DISPERSED WITHIN THE MOLTEN METAL DECREASES THE NORMAL FLUIDITY OF SAID MOLTEN METAL; INTRODUCING A SUBSTANCE WHICH PRODUCES A GAS WHEN HEATED TO THE TEMPERTURE OF THE MELT INTO SAID MELT; MIXING SAID SUBSTANCES SUBSTANTIALLY THROUGHOUT THE MELT, THEREBY PRODUCING A PLURALITY OF GAS BUBBLES THROUGHOUT SAID MELT AND FORMING A FOAMED MELT, SAID GAS BEING RETAINED WITHIN SAID MELT DUE PRINCIPALLY TO THE HIGH VISCOSITY OF SAID MELT RESULTING FROM SAID DISPERSED AGGREGATE PARTICLES; AND COOLING SAID FOAMED MELT BELOW THE SOLIDUS TEMPERATURE OF SAID MELT TO FORM A FOAMED METAL HAVING A PLURALITY OF CLOSED CELLS AND PARTICLES OF SAID NONMETALLIC AGGREGATE DISPERSED WITHIN A MATRIX OF SAID FUSIBLE METAL.
Claim 2
Independent Claim
166 words
A METHOD OF PRODUCING FOAMED METAL WHEREIN GASEOUS BUBBLES ARE RETAINED WITHIN A MASS OF MOLTEN METAL DURING THE FOAMING, COMPRISING THE STEPS OF: HEATING A FUSIBLE METAL AND PARTICLES OF A SILICEOUS NONMETALLIC AGGREGATE ABOVE THE SOLIDUS TEMPERATURE OF SAID METAL, BUT BELOW THE LIQUIDUS TEMPERATURE OF SAID METAL, WHEREBY SAID SOLID AGGREGATE DISPERSED WITHIN THE MOLTEN METAL DECREASES THE NORMAL FLUIDITY OF SAID MOLTEN METAL; INTRODUCING A SUBSTANCE WHICH PRODUCES A GAS WHEN HEATED TO THE TEMPERTURE OF THE MELT INTO SAID MELT; MIXING SAID SUBSTANCES SUBSTANTIALLY THROUGHOUT THE MELT, THEREBY PRODUCING A PLURALITY OF GAS BUBBLES THROUGHOUT SAID MELT AND FORMING A FOAMED MELT, SAID GAS BEING RETAINED WITHIN SAID MELT DUE PRINCIPALLY TO THE HIGH VISCOSITY OF SAID MELT RESULTING FROM SAID DISPERSED AGGREGATE PARTICLES; AND COOLING SAID FOAMED MELT BELOW THE SOLIDUS TEMPERATURE OF SAID MELT TO FORM A FOAMED METAL HAVING A PLURALITY OF CLOSED CELLS AND PARTICLES OF SAID NONMETALLIC AGGREGATE DISPERSED WITHIN A MATRIX OF SAID FUSIBLE METAL.
Claim 3
Dependent Claim
46 words
A METAL FOAM BODY, COMPRISING: A METAL MATRIX HAVING DISPERSED THERETHROUGH A PLURALITY OF COMPLETELY CLOSED CELLS SUBSTANTIALLY FILLED WITH GAS; AND SOLID NON-METALLIC SILICEOUS PARTICLES DISPERSED WITHIN SAID MATRIX WHEREIN SAID SOLID NON-METALLIC SILICEOUS PARTICLES COMPRISE LESS THAN 50 WEIGHT PERCENT OF SAID FORM BODY.
Claim 4
Dependent Claim
46 words
A METAL FOAM BODY, COMPRISING: A METAL MATRIX HAVING DISPERSED THERETHROUGH A PLURALITY OF COMPLETELY CLOSED CELLS SUBSTANTIALLY FILLED WITH GAS; AND SOLID NON-METALLIC SILICEOUS PARTICLES DISPERSED WITHIN SAID MATRIX WHEREIN SAID SOLID NON-METALLIC SILICEOUS PARTICLES COMPRISE LESS THAN 50 WEIGHT PERCENT OF SAID FORM BODY.
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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |