US3133839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving stress-corrosion resistance of age-hardenable alloys
Assignee: Elkem Metals Co LP
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Filing: 1961-05-11
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Granted: 1964-05-19
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Expires: 1981-05-11
Abstract
No abstract record available.
Inventors
- 👤 Thomas Gareth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:23
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/04; C22F1/053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A PROCESS FOR IMPROVING THE STRESS-CORROSION RESISTANCE OF AN AGE-HARDENABLE ALLOY CONSISTING ESSENTIALLY OF ZINC IN AN AMOUNT BETWEEN ABOUT ONE AND ABOUT TEN PERCENT BY WEIGHT, MAGNESIUM IN AN AMOUNT BETWEEN ABOUT ONE AND ABOUT FOUR PERCENT BY WEIGHT, AND THE BALANCE ALUMINUM, COMPRISING PARTIALLY AGING SAID ALLOY AT A TEMPERATURE BETWEEN ABOUT 100* AND ABOUT 160*C., COLD WORKING SAID AOOLY BETWEEN ABOUT 5 AND ABOUT 10 PERCENT, AND COMPLETING THE AGING OF SAID ALLOY AT A TEMPERATURE BETWEEN ABOUT 100*C. AND THE TEMPERATURE EMPLOYED IN SAID PARTIAL AGING STEP.
Claim 2
Dependent Claim
91 words
A PROCESS FOR IMPROVING THE STRESS-CORROSION RESISTANCE OF AN AGE-HARDENABLE ALLOY CONSISTING ESSENTIALLY OF ZINC IN AN AMOUNT BETWEEN ABOUT ONE AND ABOUT TEN PERCENT BY WEIGHT, MAGNESIUM IN AN AMOUNT BETWEEN ABOUT ONE AND ABOUT FOUR PERCENT BY WEIGHT, AND THE BALANCE ALUMINUM, COMPRISING PARTIALLY AGING SAID ALLOY AT A TEMPERATURE BETWEEN ABOUT 100* AND ABOUT 160*C., COLD WORKING SAID AOOLY BETWEEN ABOUT 5 AND ABOUT 10 PERCENT, AND COMPLETING THE AGING OF SAID ALLOY AT A TEMPERATURE BETWEEN ABOUT 100*C. AND THE TEMPERATURE EMPLOYED IN SAID PARTIAL AGING STEP.
References Cited (Backward Citations)
US2083576A
Cited
US2506788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |