US3078191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum alloys recrystallizing at lower temperature
Assignee: Furukawa Electric Co Ltd
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Filing: 1958-11-04
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Granted: 1963-02-19
•
Expires: 1978-11-04
Abstract
No abstract record available.
Inventors
- 👤 Maeda Shinpei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:08
CPC Classifications
C; C22; C22C; C22C21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS OF TREATING ALUMINUM COMPRISING ADDING 0.001 TO 0.47% OF CALCIUM TO THE ALUMINUM, HEATING SAID ALUMINUM TO A TEMPERATURE BETWEEN ABOUT 250% TO 500* C. FOR AT LEAST TEN HOURS, GRADUALLY COOLING SAID ALUMINUM TO A TEMPERATURE BETWEEN 150* C. AND ITS RECRYSTALLIZATION TEMPERATURE AND COLD WORKING THE ALUMINUM TO PRODUCE MORE THAN A 30% REDUCTION IN THE CROSS SECTIONAL AREA.
Claim 2
Dependent Claim
63 words
A PROCESS OF TREATING ALUMINUM COMPRISING ADDING 0.001 TO 0.47% OF CALCIUM TO THE ALUMINUM, HEATING SAID ALUMINUM TO A TEMPERATURE BETWEEN ABOUT 250% TO 500* C. FOR AT LEAST TEN HOURS, GRADUALLY COOLING SAID ALUMINUM TO A TEMPERATURE BETWEEN 150* C. AND ITS RECRYSTALLIZATION TEMPERATURE AND COLD WORKING THE ALUMINUM TO PRODUCE MORE THAN A 30% REDUCTION IN THE CROSS SECTIONAL AREA.
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) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |