Patricia A Schwartz

US Patent:

8043404, Oct 25, 2011

Filed:

Feb 17, 2006

Appl. No.:

11/356025

Inventors:

Stanley Abkowitz - Lexington MA, US
Susan M. Abkowitz - Burlington MA, US
Harvey Fisher - Lexington MA, US
Patricia J. Schwartz - Andover MA, US

Assignee:

Dynamet Technology, Inc. - Burlington MA

International Classification:

C22C 49/11
C22C 49/12
B22F 3/12
B22F 3/20

US Classification:

75245, 75236, 75244, 419 12, 419 14, 419 28, 419 38

Abstract:

Disclosed herein are extruded titanium metal matrix composites with enhanced ductility. Also disclosed is the extrusion at high extrusion ratio of titanium metal matrix composites produced by powder metal processes. The ductility and machinability of these titanium metal matrix composites extruded at high extrusion ratios combined with their wear resistance and excellent imaging characteristics makes these high extrusion ratio extruded titanium metal matrix composites useful as biological implants, including prosthetic devices. Also disclosed are articles such as orthopedic implants for knee, hip, spine or other biomedical devices, with enhanced properties, made from the disclosed extruded material.

US Patent:

20050268746, Dec 8, 2005

Filed:

Apr 19, 2005

Appl. No.:

11/108865

Inventors:

Stanley Abkowitz - Lexington MA, US
Susan Abkowitz - Burlington MA, US
Harvey Fisher - Lexington MA, US
Patricia Schwartz - Andover MA, US

International Classification:

C22C014/00
B22F003/24

US Classification:

075248000, 148421000, 419028000

Abstract:

Disclosed herein are titanium-tungsten alloys and composites wherein the tungsten comprises 0.5% to 40% by weight of the alloy. Also disclosed is a method of making such alloys and composites using powders of tungsten less then 3 μm in size, such as 1 μm or less. Also disclosed is a method of making the titanium alloy by powder metallurgy, and products made from such alloys or billets that may be cast, forged, or extruded. These methods of production can be used to make titanium alloys comprising other slow-diffusing beta stabilizers, such as but not limited to V, Nb, Mo, and Ta.

US Patent:

20060157543, Jul 20, 2006

Filed:

Nov 9, 2005

Appl. No.:

11/269764

Inventors:

Stanley Abkowitz - Lexington MA, US
Susan Abkowitz - Burlington MA, US
Harvey Fisher - Lexington MA, US
Patricia Schwartz - Andover MA, US

International Classification:

B23K 31/02

US Classification:

228233200

Abstract:

Disclosed herein are alpha-beta titanium alloys processed above the beta transus temperature yet that maintain a fine grain structure. Disclosed herein are articles comprising a titanium alloy body and a porous titanium material attached to the body, wherein the titanium alloy body has a grain size of less than or equal to 0.1 inch. Such articles may be useful as orthopedic implant devices, such as those for the knee, hip, or other prostheses. Also disclosed is a powder metal process for producing such articles, which includes consolidating powdered metals to full density by pressing, sintering and hot isostatic pressing. The shape can be further extruded to a mill product or forged to near net shape.

US Patent:

20070248485, Oct 25, 2007

Filed:

Mar 15, 2006

Appl. No.:

11/374959

Inventors:

Stanley Abkowitz - Lexington MA, US
Susan Abkowitz - Burlington MA, US
Harvey Fisher - Lexington MA, US
Patricia Schwartz - Andover MA, US

International Classification:

C22C 14/00
C22F 1/18

US Classification:

420417000, 148669000

Abstract:

Disclosed herein is a scratch-resistant article for covering an object, such as a cellular phone, wherein the article comprises titanium metal or titanium alloy with grain size greater than 0.030 inch. Also disclosed is a method of producing such articles comprising thermally treating titanium in vacuum at a minimum temperature of 1900 F. for at least 5 minutes.

US Patent:

20080029186, Feb 7, 2008

Filed:

Feb 13, 2007

Appl. No.:

11/705593

Inventors:

Stanley Abkowitz - Lexington MA, US
Susan Abkowitz - Burlington MA, US
Harvey Fisher - Lexington MA, US
Patricia Schwartz - Andover MA, US

International Classification:

C22C 14/00
B22F 3/02
B22F 3/15
C22F 1/16
B22F 3/24

US Classification:

148407000, 148421000, 148671000, 419028000, 419066000

Abstract:

The present disclosure is related to homogeneous alloys comprising titanium and 9% to less than 20% by weight of tungsten, wherein the alloy has a yield strength of at least 120,000 psi and ductility of least 20% elongation; and with further alloying an ultimate tensile strength of at least 200,000 psi and useful ductility of at least 2% elongation; and with the addition of ceramic particulate reinforcements can exhibit an ultimate tensile strength of at least 180,000 psi. Products and metal matrix composites comprising such homogeneous alloys are also disclosed. The metal matrix composites further comprise a discontinuous reinforcement chosen from TiC, TiB, or TiB, particles or combinations of such particles. Method of making such alloys and composites as well as products made from such alloys and composites are also disclosed.

US Patent:

20110233057, Sep 29, 2011

Filed:

Feb 22, 2011

Appl. No.:

13/032374

Inventors:

Stanley Abkowitz - Lexington MA, US
Susan M. Abkowitz - Burlington MA, US
Harvey Fisher - Lexington MA, US
Patricia J. Schwartz - Andover MA, US

International Classification:

C22C 14/00
B22F 3/20
B22F 3/24
B22F 3/15
B22F 3/12
B22F 3/17
B22F 3/18
F01D 5/28
C23C 14/14

US Classification:

20429813, 420417, 419 28, 416241 R

Abstract:

The present disclosure is related to homogeneous alloys comprising titanium and 9% to less than 20% by weight of tungsten, wherein the alloy has a yield strength of at least 120,000 psi and ductility of least 20% elongation; and with further alloying an ultimate tensile strength of at least 200,000 psi and useful ductility of at least 2% elongation; and with the addition of ceramic particulate reinforcements can exhibit an ultimate tensile strength of at least 180,000 psi. Products and metal matrix composites comprising such homogeneous alloys are also disclosed. The metal matrix composites further comprise a discontinuous reinforcement chosen from TiC, TiB, or TiB, particles or combinations of such particles. Method of making such alloys and composites as well as products made from such alloys and composites are also disclosed.

US Patent:

20140079583, Mar 20, 2014

Filed:

Mar 26, 2013

Appl. No.:

13/850488

Inventors:

Stanley Abkowitz - Lexington MA, US
Susan M. Abkowitz - Burlington MA, US
Harvey Fisher - Lexington MA, US
Patricia J. Schwartz - Andover MA, US

Assignee:

Dynamet Technology, Inc. - Burlington MA

International Classification:

B22F 3/12
C22C 14/00

US Classification:

419 12, 419 32, 419 28, 419 23, 419 14, 420417, 420421

Abstract:

Disclosed herein are titanium-tungsten alloys and composites wherein the tungsten comprises 0.5% to 40% by weight of the alloy. Also disclosed is a method of making such alloys and composites using powders of tungsten less then 3 μm in size, such as 1 μm or less. Also disclosed is a method of making the titanium alloy by powder metallurgy, and products made from such alloys or billets that may be cast, forged, or extruded. These methods of production can be used to make titanium alloys comprising other slow-diffusing beta stabilizers, such as but not limited to V, Nb, Mo, and Ta.

US Patent:

20140373680, Dec 25, 2014

Filed:

Apr 21, 2014

Appl. No.:

14/257867

Inventors:

- Burlington MA, US
Susan M. Abkowitz - Burlington MA, US
Harvey Fisher - Lexington MA, US
Patricia J. Schwartz - Andover MA, US

Assignee:

Dynamet Technology, Inc. - Burlington MA

International Classification:

C22C 14/00

US Classification:

75245, 420420

Abstract:

The present disclosure is related to homogeneous alloys comprising titanium and 9% to less than 20% by weight of tungsten, wherein the alloy has a yield strength of at least 120,000 psi and ductility of least 20% elongation; and with further alloying an ultimate tensile strength of at least 200,000 psi and useful ductility of at least 2% elongation; and with the addition of ceramic particulate reinforcements can exhibit an ultimate tensile strength of at least 180,000 psi. Products and metal matrix composites comprising such homogeneous alloys are also disclosed. The metal matrix composites further comprise a discontinuous reinforcement chosen from TiC, TiB, or TiB, particles or combinations of such particles. Method of making such alloys and composites as well as products made from such alloys and composites are also disclosed.