Patent US4636355A successfully refreshed from Google Patents.
US4636355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacture of highly ductile material
Assignee: National Institute of Advanced Industrial Science and Technology
•
Filing: 1985-11-14
•
Granted: 1987-01-13
•
Expires: 2005-11-14
Abstract
Abstract A method for the manufacture of a highly ductile material comprises melting an alloy material in a crucible held under a vacuum, inserting a stirring bar in the molten alloy material in the crucible and rotating the stirring bar at a low speed, causing the stirring bar to be rotated at a high speed after the molten alloy material has reached the temperature for starting solidification, and continuing the high speed rotation of the stirring bar until immediately before completion of the solidification.
Inventors
- 👤 Kiyoshi Ichikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:38
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/12; Y; Y10; Y10S; Y10S420/00; Y10S420/902
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
102 words
A method for the manufacture of a highly ductile material, which comprises melting an alloy material in a crucible held under a vacuum, inserting a stirring bar in the molten alloy material in said crucible and while cooling said molten alloy material rotating said stirring bar at a speed of less than 1,000 rpm, causing the stirring bar to be rotated at a high speed of more than 2,000 rpm after said molten alloy material has reached the temperature for starting solidification, and continuing said rotation of said stirring bar at more than 2,000 rpm until immediately before completion of the solidification.
Claim 2
Independent Claim
102 words
A method for the manufacture of a highly ductile material, which comprises melting an alloy material in a crucible held under a vacuum, inserting a stirring bar in the molten alloy material in said crucible and while cooling said molten alloy material rotating said stirring bar at a speed of less than 1,000 rpm, causing the stirring bar to be rotated at a high speed of more than 2,000 rpm after said molten alloy material has reached the temperature for starting solidification, and continuing said rotation of said stirring bar at more than 2,000 rpm until immediately before completion of the solidification.
Claim 3
Dependent Claim
14 words
A method according to claim 1, wherein said alloy material is an Al-Cu alloy.
Claim 4
Dependent Claim
14 words
A method according to claim 1, wherein said alloy material is an Al-Pb alloy.
References Cited (Backward Citations)
US3948650A
Cited
US3951651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-12 | 1990-07-14 | 1991-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-12 | 1994-07-14 | 1995-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-12 | 1998-07-14 | 1999-01-13 | $7700.00 | Window Closed / Lapsed |