US2522575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forging aluminum alloy
Assignee: High Duty Alloys Ltd
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Filing: 1949-01-10
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Granted: 1950-09-19
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Expires: 1969-01-10
Abstract
No abstract record available.
Inventors
- 👤 Hall Horace Campbell
- 👤 Gresham Harold Ernest
- 👤 Doyle William Michael
- 👤 Wilson Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:55
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A FORGED ALUMINUIM ALLOY CONSISTING BY WEIGHT OF 1.8% TO 2.5% COPPER, 1.2% TO 2.0% MAGNESIUM, 0.8% TO 1.5% NICKEL, 0.85% TO 1.5% IRON, THE IRON AND NICKEL TOGETHER NOT EXCEEDING 2.75%, UP TO AND NOT EXCEEDING 0.4% SILICON, 0.02% TO 0.2% TITANIUM, AND THE BALANCE ESSENTIALLY ALL ALUMINIUM SUBSTANTIALLY AS DESCRIBED, SAID ALLOY BEING IN THE CONDITION CREATED BY ITS HAVING BEEN SUBJECTED IN THE ORDER STATED TO DIRECT CHILL CASTING, FORGING, SOLUTION HEAT TREATING AT 252* TO 545* C. FOR 2 TO 30 HOURS, QUENCHING, AND THEN AGEING TO 170* TO 250* C. FOR 1 TO 30 HOURS.
Claim 2
Dependent Claim
100 words
A FORGED ALUMINUIM ALLOY CONSISTING BY WEIGHT OF 1.8% TO 2.5% COPPER, 1.2% TO 2.0% MAGNESIUM, 0.8% TO 1.5% NICKEL, 0.85% TO 1.5% IRON, THE IRON AND NICKEL TOGETHER NOT EXCEEDING 2.75%, UP TO AND NOT EXCEEDING 0.4% SILICON, 0.02% TO 0.2% TITANIUM, AND THE BALANCE ESSENTIALLY ALL ALUMINIUM SUBSTANTIALLY AS DESCRIBED, SAID ALLOY BEING IN THE CONDITION CREATED BY ITS HAVING BEEN SUBJECTED IN THE ORDER STATED TO DIRECT CHILL CASTING, FORGING, SOLUTION HEAT TREATING AT 252* TO 545* C. FOR 2 TO 30 HOURS, QUENCHING, AND THEN AGEING TO 170* TO 250* C. FOR 1 TO 30 HOURS.
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) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |