US3147156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of extrusion and extrusion billet therefor
Assignee: Dow Chemical Co
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Filing: 1961-07-10
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Granted: 1964-09-01
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Expires: 1981-07-10
Abstract
No abstract record available.
Inventors
- 👤 George S Foerster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:07
CPC Classifications
C; C22; C22C; C22C23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
AN IMPROVED EXTRUSION BILLET FORMED BY PREPARING AN INTIMATE ADMIXTURE CONSISTING ESSENTILLY OF (1) PARTICULATE MAGNESIUM-BASE ALLOY CONTAINING AT LEST ONE FIRST ALLOYING COMPONENT AND (2) AT LEAST ONE ADDITIONAL ALLOYING COMPONENT INFINELY DIVIDED FORM WHICH IS MUTUALLY SOLID-INSOLUBLE WITHEACH SAID FIRST ALLOYING COMPONENT IN SAID MAGNESIUM-BASE ALLOY, SUBJECTING THE SAID ADMIXTURE IN A CLOSED VESSEL TO A PRESSURE AND A TEMPERATURE LESS THAN EXTRUSION CONDITIONS BUT SUFFICIENT TO CAUSE THE PARTICLES OF THE ADMIXTURE TO BECOME WELDED TOGETHER INTO A COHERENT PRE-EXTRUSION MASS, AND SUBSEQUENTLY HEAT TREATING THE SAID COHERENT MASS WHEREBY THE SAID MAGNESIUMBASE ALLOY THEREIN IS PRECIPITATION HARDENED THEREBY TO PROVIDE AN EXTRUSION BILLET ADAPTED TO BE EXTRUDED AT RELATIVELY HIGH SPEEDS.
Claim 2
Dependent Claim
115 words
AN IMPROVED EXTRUSION BILLET FORMED BY PREPARING AN INTIMATE ADMIXTURE CONSISTING ESSENTILLY OF (1) PARTICULATE MAGNESIUM-BASE ALLOY CONTAINING AT LEST ONE FIRST ALLOYING COMPONENT AND (2) AT LEAST ONE ADDITIONAL ALLOYING COMPONENT INFINELY DIVIDED FORM WHICH IS MUTUALLY SOLID-INSOLUBLE WITHEACH SAID FIRST ALLOYING COMPONENT IN SAID MAGNESIUM-BASE ALLOY, SUBJECTING THE SAID ADMIXTURE IN A CLOSED VESSEL TO A PRESSURE AND A TEMPERATURE LESS THAN EXTRUSION CONDITIONS BUT SUFFICIENT TO CAUSE THE PARTICLES OF THE ADMIXTURE TO BECOME WELDED TOGETHER INTO A COHERENT PRE-EXTRUSION MASS, AND SUBSEQUENTLY HEAT TREATING THE SAID COHERENT MASS WHEREBY THE SAID MAGNESIUMBASE ALLOY THEREIN IS PRECIPITATION HARDENED THEREBY TO PROVIDE AN EXTRUSION BILLET ADAPTED TO BE EXTRUDED AT RELATIVELY HIGH SPEEDS.
References Cited (Backward Citations)
US2299207A
Cited
US2659131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |