US2670309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal-working process and product
Assignee: Alcoa Corp
•
Filing: 1950-07-03
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Granted: 1954-02-23
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Expires: 1970-07-03
Abstract
No abstract record available.
Inventors
- 👤 Thomas I Mcclintock
- 👤 Alvin L Hurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:29
CPC Classifications
C; C22; C22C; C22C21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
THE PROCESS OF PRODUCING ALUMINOUS METAL EXTRUSIONS HAVING LOW TEMPERATURE RECRYSTALLIZATION CHARACTERISTICS WHEN COLD WORKED COMPRISING PROVIDING A BODY CONSISTING ESSENTIALLY OF ALUMINUM, A TOTAL OF 0.01 TO 0.8% IRON AND SILICON IMPURITIES, THE AMOUNT OF IRON NOT EXCEEDIING 4/3 OF THE SILICON CONTENT, AND AN ELEMENT SELECTED FORM THE GROUP CONSISTING OF 0.005 TO 0.25% BERYLLIUM AND 0.04% TO 1% NICKEL, HEATING SAID BODY TO A TEMPERATURE BETWEEN 850 AND 950* F., HOLDING SAID BODY AT SAID TEMPERATURE FOR A PERIOD OF 1 TO 12 HOURS, COOLING SAID BODY TO A TEMPERATURE BETWEEN 500 AND 650* F. AT A CONTROLLED RATE NOT EXCEEDING 50* F. PER HOUR, HOLDING SAID BODY WITHIN SAID TEMPERATURE RANGE FOR A PERIOD OF 1 TO 12 HOURS, AND THEREAFTER EXTRUDING IT AT A TEMPERATURE BETWEEN 400 AND 550* F.
Claim 2
Dependent Claim
135 words
THE PROCESS OF PRODUCING ALUMINOUS METAL EXTRUSIONS HAVING LOW TEMPERATURE RECRYSTALLIZATION CHARACTERISTICS WHEN COLD WORKED COMPRISING PROVIDING A BODY CONSISTING ESSENTIALLY OF ALUMINUM, A TOTAL OF 0.01 TO 0.8% IRON AND SILICON IMPURITIES, THE AMOUNT OF IRON NOT EXCEEDIING 4/3 OF THE SILICON CONTENT, AND AN ELEMENT SELECTED FORM THE GROUP CONSISTING OF 0.005 TO 0.25% BERYLLIUM AND 0.04% TO 1% NICKEL, HEATING SAID BODY TO A TEMPERATURE BETWEEN 850 AND 950* F., HOLDING SAID BODY AT SAID TEMPERATURE FOR A PERIOD OF 1 TO 12 HOURS, COOLING SAID BODY TO A TEMPERATURE BETWEEN 500 AND 650* F. AT A CONTROLLED RATE NOT EXCEEDING 50* F. PER HOUR, HOLDING SAID BODY WITHIN SAID TEMPERATURE RANGE FOR A PERIOD OF 1 TO 12 HOURS, AND THEREAFTER EXTRUDING IT AT A TEMPERATURE BETWEEN 400 AND 550* F.
References Cited (Backward Citations)
GB211027A
Cited
US2218459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |