US4337090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat recoverable nickel/titanium alloy with improved stability and machinability
Assignee: Memry Corp
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Filing: 1980-09-05
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Granted: 1982-06-29
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Expires: 2000-09-05
Abstract
Abstract Nickel/titanium alloys containing less than a stoichiometric quantity of titanium, which are capable of having the property of heat recoverability imparted thereto at a temperature above the boiling point of liquid nitrogen, may be stabilized by the addition of from 1.5 to 9 atomic percent copper. These stabilized alloys also possess improved workability and machinability.
Inventors
- 👤 John D. Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:49
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22F; C22F1/00; C22F1/006
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
99 words
A shape memory alloy consisting essentially of nickel, titanium and copper within an area defined on a nickel, titanium, and copper ternary phase diagram by a triangle with its first vertex at 49.7 atomic percent nickel, 48.8 atomic percent titanium, and 1.5 atomic percent copper; its second vertex at 47.5 atomic percent nickel, 47.5 atomic percent titanium, and 5.0 atomic percent copper; and its third vertex at 47.5 atomic percent nickel, 43.5 atomic percent titanium, and 9.0 atomic percent copper, said alloy possessing improved temper stability and machinability and having an A 50 between -50° C. and -196° C.
Claim 2
Dependent Claim
99 words
A shape memory alloy consisting essentially of nickel, titanium and copper within an area defined on a nickel, titanium, and copper ternary phase diagram by a triangle with its first vertex at 49.7 atomic percent nickel, 48.8 atomic percent titanium, and 1.5 atomic percent copper; its second vertex at 47.5 atomic percent nickel, 47.5 atomic percent titanium, and 5.0 atomic percent copper; and its third vertex at 47.5 atomic percent nickel, 43.5 atomic percent titanium, and 9.0 atomic percent copper, said alloy possessing improved temper stability and machinability and having an A 50 between -50° C. and -196° C.
Claim 3
Dependent Claim
116 words
A shape memory alloy consisting essentially of nickel, titanium and copper within an area defined on a nickel, titanium, and copper ternary phase diagram by a quadrilateral with its first vertex at 49.7 atomic percent nickel, 48.8 atomic percent titanium, and 1.5 atomic percent copper; its second vertex at 47.5 atomic percent nickel, 47.5 atomic percent titanium, and 5.0 atomic percent copper; its third vertex at 47.5 atomic percent nickel, 46.0 atomic percent titanium, and 6.5 atomic percent copper; and its fourth vertex at 48.9 atomic percent nickel, 46.8 atomic percent titanium, and 4.3 atomic percent copper, said alloy possessing improved temper stability and machinability and having an A 50 between -50° C. and -196° C.
Claim 4
Dependent Claim
116 words
A shape memory alloy consisting essentially of nickel, titanium and copper within an area defined on a nickel, titanium, and copper ternary phase diagram by a quadrilateral with its first vertex at 49.7 atomic percent nickel, 48.8 atomic percent titanium, and 1.5 atomic percent copper; its second vertex at 47.5 atomic percent nickel, 47.5 atomic percent titanium, and 5.0 atomic percent copper; its third vertex at 47.5 atomic percent nickel, 46.0 atomic percent titanium, and 6.5 atomic percent copper; and its fourth vertex at 48.9 atomic percent nickel, 46.8 atomic percent titanium, and 4.3 atomic percent copper, said alloy possessing improved temper stability and machinability and having an A 50 between -50° C. and -196° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |