Patent US3297431A successfully refreshed from Google Patents.
US3297431A
Expired / Lapsed
US
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Cellarized metal and method of producing same
Assignee: Standard Oil Co
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Filing: 1965-06-02
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Granted: 1967-01-10
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Expires: 1985-06-02
Abstract
No abstract record available.
Inventors
- 👤 Jr John A Ridgway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:04
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/10; B22D11/11; B22D25/00; B22D25/005; C; C22; C22C; C22C1/00; C22C1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN THE METHOD OF PRODUCING CELLULARIZED METAL BY DECOMPOSITION OF A HEAT-DECOMPOSABLE GAS EVOLVING COMPOUND IN MOLTEN METAL FOLLOWED BY RAPID COOLING OF SAID METAL, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID METAL PRIOR TO DECOMPOSITION OF SAID HEAT-DECOMPOSABLE GAS EVOLVING COMPOUND AN INTIMATELY DISPERSED FINELY DIVIDED POWDER, SAID POWDER PRESENT IN AN AMOUNT NOT EXCEEDING 50 PERCENT BY WEIGHT BUT IN AN AMOUT SUFFICIENT TO RENDER A MATRIX OF THE METAL STABLE WHEN SAID METAL IS IN MOLTEN CONDITION TO CONFINE PREDOMINANTLY CONTIGUOUS AND COMPACT GAS-FILLED CELLS, SAID POWDER POSSESSED OF THE PROPERTIES OF: (1) BEING WETTED BY THE METAL WHEN THE LATTER IS IN MOLTEN CONDITION, AND (2) BEING SUBSTANTIALLY STABLE IN THE PRESENCE OF THE METAL WHEN SAID METAL IS IN MOLTEN CONDITION.
Claim 2
Dependent Claim
126 words
IN THE METHOD OF PRODUCING CELLULARIZED METAL BY DECOMPOSITION OF A HEAT-DECOMPOSABLE GAS EVOLVING COMPOUND IN MOLTEN METAL FOLLOWED BY RAPID COOLING OF SAID METAL, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID METAL PRIOR TO DECOMPOSITION OF SAID HEAT-DECOMPOSABLE GAS EVOLVING COMPOUND AN INTIMATELY DISPERSED FINELY DIVIDED POWDER, SAID POWDER PRESENT IN AN AMOUNT NOT EXCEEDING 50 PERCENT BY WEIGHT BUT IN AN AMOUT SUFFICIENT TO RENDER A MATRIX OF THE METAL STABLE WHEN SAID METAL IS IN MOLTEN CONDITION TO CONFINE PREDOMINANTLY CONTIGUOUS AND COMPACT GAS-FILLED CELLS, SAID POWDER POSSESSED OF THE PROPERTIES OF: (1) BEING WETTED BY THE METAL WHEN THE LATTER IS IN MOLTEN CONDITION, AND (2) BEING SUBSTANTIALLY STABLE IN THE PRESENCE OF THE METAL WHEN SAID METAL IS IN MOLTEN CONDITION.
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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |