US3252841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum alloy
Assignee: Dow Chemical Co
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Filing: 1964-09-25
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Granted: 1966-05-24
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Expires: 1984-09-25
Abstract
No abstract record available.
Inventors
- 👤 George S Foerster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:43
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/02; C22C21/06; C22C21/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A HIGH STRENGTH ALUMINUM ALLOY PELLET EXTRUSION CONSISTING ESSENTIALLY OF FROM ABOUT 0.5 TO ABOUT 2 WEIGHT PERCENT MAGNESIUM, FROM ABOUT 0.5 TO ABOUT 10 WEIGHT PERCENT SILICON, AN ADDITIVE METAL, AND REMAINDER ALUMINUM, SAID ADDITIVE METAL BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF BARIUM, CALCIUM AND CERIUM, SAID ALLOY BEING FURTHER CHARACTERIZED IN THAT THE CONCENTRATION OF SAID ADDITIVE METAL AND THE ACTUAL WEIGHT PERCENT OF SILICON IN SAID ALLOY ARE PREDETERMINED IN ACCORDANCE WITH THE FOLLOWING RELATIONSHIP: (A) WT. % SI >= (WT. % MG/1.73) + 0.1(1 - 10 WT. % BA) (B) WT. % SI >= (WT. % MG/1.73) + 1.0(0.75 - 6 WT. % CA) (C) WT. % SI >= (WT. % MG/1.73) + 0.1(1 - 20 WT. % CE) SAID EXTRUSION BEING IN THE EXTRUDED, SOLUTION HEAT TREATED, QUENCHED AND AGED CONDITION AND CHARACTERIZED BY AN UNEXPECTEDLY HIGH TENSILE STRENGTH.
Claim 2
Dependent Claim
147 words
A HIGH STRENGTH ALUMINUM ALLOY PELLET EXTRUSION CONSISTING ESSENTIALLY OF FROM ABOUT 0.5 TO ABOUT 2 WEIGHT PERCENT MAGNESIUM, FROM ABOUT 0.5 TO ABOUT 10 WEIGHT PERCENT SILICON, AN ADDITIVE METAL, AND REMAINDER ALUMINUM, SAID ADDITIVE METAL BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF BARIUM, CALCIUM AND CERIUM, SAID ALLOY BEING FURTHER CHARACTERIZED IN THAT THE CONCENTRATION OF SAID ADDITIVE METAL AND THE ACTUAL WEIGHT PERCENT OF SILICON IN SAID ALLOY ARE PREDETERMINED IN ACCORDANCE WITH THE FOLLOWING RELATIONSHIP: (A) WT. % SI >= (WT. % MG/1.73) + 0.1(1 - 10 WT. % BA) (B) WT. % SI >= (WT. % MG/1.73) + 1.0(0.75 - 6 WT. % CA) (C) WT. % SI >= (WT. % MG/1.73) + 0.1(1 - 20 WT. % CE) SAID EXTRUSION BEING IN THE EXTRUDED, SOLUTION HEAT TREATED, QUENCHED AND AGED CONDITION AND CHARACTERIZED BY AN UNEXPECTEDLY HIGH TENSILE STRENGTH.
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) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |