US3219491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal treatment of aluminum base alloy product
Assignee: Alcoa Corp
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Filing: 1962-07-13
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Granted: 1965-11-23
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Expires: 1982-07-13
Abstract
No abstract record available.
Inventors
- 👤 William A Anderson
- 👤 Jr Albert W Demmler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:07
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
THE METHOD OF PRODUCING A UNIFORM FINE GRAIN SIZE IN ANNEALED WROUGHT PRODUCTS OF AN ALLOY CONSISTING ESSENTIALLY OF ALUMINUM OAND 0.5 TO 2.0% MANGANESE, SAID METHOD COMPRISING CASTING A BODY OF SAID ALLOY, PREHEATING SAID CAST BODY BETWEEN 1050 AND 1150*F. FOR A PERIOD OF 4 TO 72 HOURS TO MINIMIZE ANY EFFECT OF SEGREGATION, COOLING AT A CONTROLLED RATE TO THE HOT WORKING TEMPERATURE RANGE, WORKING SAID KPREHEATED BODY SUFFICIENTLY TO BREAK DOWN THE CAST STRUCTURE, HEATING SAID WORKED BODY TO A TEMPERATURE BETWEEN 850 AND 1050*F. AND HOLDING WITHIN THAT TEMPERATURE RANGE FOR A PERIOD OF 1 TO 30 HOURS TO CAUSE SOLUTION OF AT LEAST A PORTION OF THE MANGANESE, COOLING THE WORKED SOLUTION TREATED PRODUCT, THEREAFTER SUBJECTING THE SAID PRODUCT TO A PRECIPITATION TREATMENT CONSISTING OF HOLDING THE PRODUCT WITHIN THE TEMPERATURE RANGE OF 600 TO 800*F. FOR A PERIOD OF 2 TO 30 HOURS, COOLING THE PRECIPATION TREATED PRODUCT TO ROOM TEMPERATURE, COLD WORKING SAID PRODUCT WITH A REDUCTION OF AT LEAST 10% AND FINALLY ANNEALING THE COLD WORKED PRODUCE AT 650 TO 800*F.
Claim 2
Independent Claim
180 words
THE METHOD OF PRODUCING A UNIFORM FINE GRAIN SIZE IN ANNEALED WROUGHT PRODUCTS OF AN ALLOY CONSISTING ESSENTIALLY OF ALUMINUM OAND 0.5 TO 2.0% MANGANESE, SAID METHOD COMPRISING CASTING A BODY OF SAID ALLOY, PREHEATING SAID CAST BODY BETWEEN 1050 AND 1150*F. FOR A PERIOD OF 4 TO 72 HOURS TO MINIMIZE ANY EFFECT OF SEGREGATION, COOLING AT A CONTROLLED RATE TO THE HOT WORKING TEMPERATURE RANGE, WORKING SAID KPREHEATED BODY SUFFICIENTLY TO BREAK DOWN THE CAST STRUCTURE, HEATING SAID WORKED BODY TO A TEMPERATURE BETWEEN 850 AND 1050*F. AND HOLDING WITHIN THAT TEMPERATURE RANGE FOR A PERIOD OF 1 TO 30 HOURS TO CAUSE SOLUTION OF AT LEAST A PORTION OF THE MANGANESE, COOLING THE WORKED SOLUTION TREATED PRODUCT, THEREAFTER SUBJECTING THE SAID PRODUCT TO A PRECIPITATION TREATMENT CONSISTING OF HOLDING THE PRODUCT WITHIN THE TEMPERATURE RANGE OF 600 TO 800*F. FOR A PERIOD OF 2 TO 30 HOURS, COOLING THE PRECIPATION TREATED PRODUCT TO ROOM TEMPERATURE, COLD WORKING SAID PRODUCT WITH A REDUCTION OF AT LEAST 10% AND FINALLY ANNEALING THE COLD WORKED PRODUCE AT 650 TO 800*F.
References Cited (Backward Citations)
US2966731A
Cited
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 |