US3219492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal treatment of aluminum base alloy product
Assignee: Alcoa Corp
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Filing: 1962-11-16
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Granted: 1965-11-23
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Expires: 1982-11-16
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
2026-11-06 06:19
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/06; C22F; C22F1/00; C22F1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
THE METHOD OF PRODUCING A UNIFORM FINE GRAIN SIZE IN ANNEALED WROUGHT PRODUCTS OF AN ALLOY CONSISTING ESSENTIALLY OF ALUMINUM AND 0.5 TO 2.0% MANGANESE, SAID METHOD COMPRISING PROVIDING A BODY OF SAID ALLOY CONTAINING A SUBSTANTIAL PROPORTION OF THE MANGANESE CONTENT IN SOLUTION, PREHEATING SAID BODY AT 1050 TO 1150* F. FOR A PERIOD OF 4 TO 72 HOURS TO INITITATE PRECIPITATION OF THE DISSOLVED MANGANESE, COOLING SAID PREHEATED BODY TO A HOT WORKING TEMPERATURE RANGE OF 650 TO 900*F., HOT WORKING SAID JBODY AND THEREAFTER COOLING BELOW THE MINIMUM HOT WORKING TEMPERATURE, REHEATING SAID WORKED BODY TO BETWEEN 850 AND 1025*F. AND HOLDING WITHIN THAT TEMPERATURE RANGE FOR A PERIOD OF 1 TO 30 HOURS AND FOR A SUFFICIENT LENGTH OF TIME TO CAUSE A RE-SOULTION OF AT LEAST A PORTION OF THE PREVIOUSLY PRECIPITATED MANGANESE, SLOWLY COOLING THE SAID SOLUTION HEAT TREATED PRODUCT TO 700* F. AT A RATE OF 15 TO 50*F. PER HOUR, CONTINUING THE COOLING TO ROOM TEMPERATURE AT AN UNCONTROLLED RATE, COLD WORKING SAID COOLED PRODUCT WITH A REDUCTION OF AT LEAST 10% AND FINALLY ANNEALING THE COLD WORKED PRODUCT AT 650 TO 800*F.
Claim 2
Independent Claim
191 words
THE METHOD OF PRODUCING A UNIFORM FINE GRAIN SIZE IN ANNEALED WROUGHT PRODUCTS OF AN ALLOY CONSISTING ESSENTIALLY OF ALUMINUM AND 0.5 TO 2.0% MANGANESE, SAID METHOD COMPRISING PROVIDING A BODY OF SAID ALLOY CONTAINING A SUBSTANTIAL PROPORTION OF THE MANGANESE CONTENT IN SOLUTION, PREHEATING SAID BODY AT 1050 TO 1150* F. FOR A PERIOD OF 4 TO 72 HOURS TO INITITATE PRECIPITATION OF THE DISSOLVED MANGANESE, COOLING SAID PREHEATED BODY TO A HOT WORKING TEMPERATURE RANGE OF 650 TO 900*F., HOT WORKING SAID JBODY AND THEREAFTER COOLING BELOW THE MINIMUM HOT WORKING TEMPERATURE, REHEATING SAID WORKED BODY TO BETWEEN 850 AND 1025*F. AND HOLDING WITHIN THAT TEMPERATURE RANGE FOR A PERIOD OF 1 TO 30 HOURS AND FOR A SUFFICIENT LENGTH OF TIME TO CAUSE A RE-SOULTION OF AT LEAST A PORTION OF THE PREVIOUSLY PRECIPITATED MANGANESE, SLOWLY COOLING THE SAID SOLUTION HEAT TREATED PRODUCT TO 700* F. AT A RATE OF 15 TO 50*F. PER HOUR, CONTINUING THE COOLING TO ROOM TEMPERATURE AT AN UNCONTROLLED RATE, COLD WORKING SAID COOLED PRODUCT WITH A REDUCTION OF AT LEAST 10% AND FINALLY ANNEALING THE COLD WORKED PRODUCT 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 |