US3438771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruded article of magnesium-base alloy
Assignee: Dow Chemical Co
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Filing: 1966-09-29
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Granted: 1969-04-15
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Expires: 1986-09-29
Abstract
No abstract record available.
Inventors
- 👤 Peter F King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:44
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/002; B21C23/01; C; C22; C22C; C22C23/00; C22C23/04; C22F; C22F1/00; C22F1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
AN EXTRUDED ARTICLES FORMED OF MAGNESIUM-BASE ALLOY COMPRISING BY WEIGHT FROM 1.7 TO 2.5 PERCENT OF ZINC, FROM 0.5 TO 1.5 PERCENT OF SILICON, FROM 0.012 TO ABOUT 0.05 PERCENT OF IRON PRESENT AS AN IMPURITY AND THE BALANCE MAGNESIUM, THE RATIO OF THE WEIGHT PERCENT OF ZINC TO THE WEIGHT PERCENT OF SILICON BEING NOT LESS THAN ABOUT 1.667, THE ALUMINUM CONTENT OF THE ALLOY NOT EXCEEDING ABOUT 0.2 PERCENT BY WEIGHT, THE MANGANESE CONTENT OF THE ALLOY NOT EXCEEDING ABOUT 0.05 PERCENT BY WEIGHT AN THE EXTRUDED ARTICLE BEING FURTHER CHARACTERIZED BY A SALT WATER CORROSION RATE LOWER THAN ABOUT 1 MILLIGRAM PER SQUARE CENTIMETER PER DAY, AS DETERMINED BY A STANDARD ALTERNATE IMMERSION TEST IN 3 PERCENT AQUEOUS SODIUM CHLORIDE SOLUTION.
Claim 2
Dependent Claim
124 words
AN EXTRUDED ARTICLES FORMED OF MAGNESIUM-BASE ALLOY COMPRISING BY WEIGHT FROM 1.7 TO 2.5 PERCENT OF ZINC, FROM 0.5 TO 1.5 PERCENT OF SILICON, FROM 0.012 TO ABOUT 0.05 PERCENT OF IRON PRESENT AS AN IMPURITY AND THE BALANCE MAGNESIUM, THE RATIO OF THE WEIGHT PERCENT OF ZINC TO THE WEIGHT PERCENT OF SILICON BEING NOT LESS THAN ABOUT 1.667, THE ALUMINUM CONTENT OF THE ALLOY NOT EXCEEDING ABOUT 0.2 PERCENT BY WEIGHT, THE MANGANESE CONTENT OF THE ALLOY NOT EXCEEDING ABOUT 0.05 PERCENT BY WEIGHT AN THE EXTRUDED ARTICLE BEING FURTHER CHARACTERIZED BY A SALT WATER CORROSION RATE LOWER THAN ABOUT 1 MILLIGRAM PER SQUARE CENTIMETER PER DAY, AS DETERMINED BY A STANDARD ALTERNATE IMMERSION TEST IN 3 PERCENT AQUEOUS SODIUM CHLORIDE SOLUTION.
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) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |