US4472213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper-base shape-memory alloys
Assignee: Mitsubishi Metal Corp
•
Filing: 1983-07-20
•
Granted: 1984-09-18
•
Expires: 2003-07-20
Abstract
Abstract A copper-base shape-memory alloy having high resistance to fatigue failure as well as high ductility and, in particular, high deformability in the martensite phase is disclosed. The alloy consists essentially of 10-45% Zn, 1-10% Al, 0.05-2% Ti, 0.05-2% of one of Fe and Ni, the balance being Cu and incidental impurities, the percent being by weight.
Inventors
- 👤 Kazuhiko Tabei
- 👤 Masafumi Hatsushika
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:29
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/006; C22C; C22C9/00; C22C9/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
49 words
A Cu-base shape-memory alloy consisting essentially of 10-45% Zn, 1-10% Al, an intermetallic compound of Ti-Fe or Ti-Ni and wherein said alloy contains 0.05-2% of said Ti and 0.05-2% of said Fe or Ni, the balance of said alloy being Cu and incidental impurities, the percents being by weight.
Claim 2
Dependent Claim
49 words
A Cu-base shape-memory alloy consisting essentially of 10-45% Zn, 1-10% Al, an intermetallic compound of Ti-Fe or Ti-Ni and wherein said alloy contains 0.05-2% of said Ti and 0.05-2% of said Fe or Ni, the balance of said alloy being Cu and incidental impurities, the percents being by weight.
Claim 3
Dependent Claim
28 words
A Cu-base shape-memory alloy consisting essentially of 10-45% Zn, 1-10% Al, 0.05-2% Ti, 0.05-2% of Fe, the balance being Cu and incidental impurities, the percent being by weight.
Claim 4
Dependent Claim
28 words
A Cu-base shape-memory alloy consisting essentially of 10-45% Zn, 1-10% Al, 0.05-2% Ti, 0.05-2% of Fe, the balance being Cu and incidental impurities, the percent being by weight.
Claim 5
Dependent Claim
28 words
A Cu-base shape-memory alloy consisting essentially of 10-45% Zn, 1-10% Al, 0.05-2% Ti, 0.05-2% of Ni, the balance being Cu and incidental impurities, the percent being by weight.
Claim 6
Dependent Claim
28 words
A Cu-base shape-memory alloy consisting essentially of 10-45% Zn, 1-10% Al, 0.05-2% Ti, 0.05-2% of Ni, the balance being Cu and incidental impurities, the percent being by weight.
References Cited (Backward Citations)
US3703367A
Cited
US4274872A
Cited
JPS5687643A
Cited
JPS5776143A
Cited
JPS57123944A
Cited
EP0071295A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |