Patent US3219490A successfully refreshed from Google Patents.
US3219490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of extrusion and extrusion billet therefor
Assignee: Dow Chemical Co
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Filing: 1960-05-13
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Granted: 1965-11-23
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Expires: 1980-05-13
Abstract
No abstract record available.
Inventors
- 👤 George S Foerster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:18
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/04; C22C; C22C1/00; C22C1/02; C22C1/04; C22C1/0408
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE IMPROVED PROCESS OF FORMING A WROUGHT ARTICLE OF MAGNESIUM-BASE ALLOY WHICH COMPRISES: PREPARING AN INTIMATE ADMIXTURE CONSISTING ESSENTIALLY OF (1) PARTICULATE MAGNESIUM-BASE ALLOY CONTAINING AT LEAST ONE FIRST ALLOYING COMPONENT AND (2) AT LEAST ONE ADDITIONAL ALLOYING COMPONENT IN FINELY DIVIDED FORM WHICH IS MUTUALLY SOLIDINSOLUBLE WITH SAID FIRST ALLOYING COMPONENT IN A MAGNESIUM-BASE ALLOY SYSTEM, HEAT TREATING THE SAID INTIMATE ADMIXTURE WHEREBY PRECIPATION HARDENING TAKES PLACE, AND AND WORKING THE SO-HEAT TREATED INDIATE ADMIXTURE.
Claim 2
Dependent Claim
76 words
THE IMPROVED PROCESS OF FORMING A WROUGHT ARTICLE OF MAGNESIUM-BASE ALLOY WHICH COMPRISES: PREPARING AN INTIMATE ADMIXTURE CONSISTING ESSENTIALLY OF (1) PARTICULATE MAGNESIUM-BASE ALLOY CONTAINING AT LEAST ONE FIRST ALLOYING COMPONENT AND (2) AT LEAST ONE ADDITIONAL ALLOYING COMPONENT IN FINELY DIVIDED FORM WHICH IS MUTUALLY SOLIDINSOLUBLE WITH SAID FIRST ALLOYING COMPONENT IN A MAGNESIUM-BASE ALLOY SYSTEM, HEAT TREATING THE SAID INTIMATE ADMIXTURE WHEREBY PRECIPATION HARDENING TAKES PLACE, AND AND WORKING THE SO-HEAT TREATED INDIATE ADMIXTURE.
References Cited (Backward Citations)
US321658A
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US1648678A
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US2249353A
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US2358667A
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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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |