IP Library › Granted Patent US 12,686,903
Granted Patent B2
US 12,686,903 · App. 18/748,309 · Granted Jul 21, 2026

Wires of superelastic nickel-titanium alloy and methods of forming the same

Inventor: Parikshith K. Kumar (Flagstaff, AZ)
Assignee: W. L. Gore & Associates, Inc.
C22C19/007C22F1/006C22F1/10C22F1/183
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Quick Facts
Patent No.
US 12,686,903
App. No.
18/748,309
Filed
Jun 20, 2024
Granted
Jul 21, 2026
Kind
B2
Art Unit
1759
USPC
420/417
Abstract

A nickel-titanium alloy with an average grain size of between 0.2 and 10 microns and a recoverable strain of greater than 9% is disclosed herein, in which the alloy is formed using a method which involves applying a shape set heat treatment to the nickel-titanium alloy. The heat treatment includes applying heat at a temperature between 225° C. and 350° C. for a period of time between 20 and 240 minutes.

Claims (5)

1 . A nickel-titanium alloy having a recoverable strain of greater than 9% increase in length of an initial total length of the alloy, wherein the nickel-titanium alloy undergoes a residual elongation of less than 0.5% of the initial total length of the alloy in response to applying the recoverable strain and removing the recoverable strain such that the alloy recovers greater than 94% of the increased length resulting from the recoverable strain.

2 . The nickel-titanium alloy of claim 1 , wherein the nickel-titanium alloy has an upper plateau length of greater than 7%.

3 . The nickel-titanium alloy of claim 1 , wherein the nickel-titanium alloy has a lower plateau stress (LPS) of less than 250 MPa, wherein the LPS is measured in response to applying the recoverable strain to the nickel-titanium alloy.

4 . The nickel-titanium alloy of claim 1 , wherein the nickel-titanium alloy has an elongation at fracture of greater than 15% in length.

5 . The nickel-titanium alloy of claim 1 , further formed into an implantable medical device.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 13, 2025
From: KUMAR, PARIKSHITH K.
To: W. L. GORE & ASSOCIATES, INC.
Reel/Frame 070213/0042 →
Continuity (3)
Continuation 17764461 · Sep 25, 2020
Provisional Application 62907500 · Sep 27, 2019
Related Publication 20240336997A1 · Oct 10, 2024
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