Patents by Inventor Joseph Grohowski
Joseph Grohowski has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240279786Abstract: A method of modifying the physical characteristics of a base titanium alloy article previously manufactured through a selective melting process is disclosed. The method includes introducing hydrogen through a thermohydrogen process to the base titanium alloy article, the resulting titanium alloy article exhibiting an isotropic and fine grained equiaxed microstructure. The thermohydrogen process may include introducing hydrogen into the base titanium alloy article to lower the beta transus temperature, heating the base titanium article above the lowered beta transus temperature to form hydrided beta, lowering the temperature of the base titanium alloy article to affect a eutectoid transformation, and dehydriding the base titanium alloy article via vacuum heating. The base titanium alloy article may have an elevated oxygen content and/or hydrogen may be introduced at 0.4 weight percent or greater.Type: ApplicationFiled: April 30, 2024Publication date: August 22, 2024Applicant: Praxis Powder Technology, Inc.Inventors: Joseph A. Grohowski, Paul H. Sheffield
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Patent number: 11987872Abstract: A method of modifying the physical characteristics of a base titanium alloy article previously manufactured through a selective melting process is disclosed. The method includes introducing hydrogen through a thermohydrogen process to the base titanium alloy article, the resulting titanium alloy article exhibiting an isotropic and fine grained equiaxed microstructure. The thermohydrogen process may include introducing hydrogen into the base titanium alloy article to lower the beta transus temperature, heating the base titanium article above the lowered beta transus temperature to form hydrided beta, lowering the temperature of the base titanium alloy article to affect a eutectoid transformation, and dehydriding the base titanium alloy article via vacuum heating. The base titanium alloy article may have an elevated oxygen content and/or hydrogen may be introduced at 0.4 weight percent or greater.Type: GrantFiled: September 15, 2021Date of Patent: May 21, 2024Assignee: Praxis Powder Technology, Inc.Inventors: Joseph A. Grohowski, Jr., Paul H. Sheffield
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Publication number: 20220002855Abstract: A method of modifying the physical characteristics of a base titanium alloy article previously manufactured through a selective melting process is disclosed. The method includes introducing hydrogen through a thermohydrogen process to the base titanium alloy article, the resulting titanium alloy article exhibiting an isotropic and fine grained equiaxed microstructure. The thermohydrogen process may include introducing hydrogen into the base titanium alloy article to lower the beta transus temperature, heating the base titanium article above the lowered beta transus temperature to form hydrided beta, lowering the temperature of the base titanium alloy article to affect a eutectoid transformation, and dehydriding the base titanium alloy article via vacuum heating. The base titanium alloy article may have an elevated oxygen content and/or hydrogen may be introduced at 0.4 weight percent or greater.Type: ApplicationFiled: September 15, 2021Publication date: January 6, 2022Applicant: Praxis Powder Technology, Inc.Inventors: JOSEPH A. GROHOWSKI, JR., PAUL H. SHEFFIELD
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Patent number: 10792484Abstract: A vascular access port includes a base with a floor. A cap is engaged with the base to form a reservoir above the floor as a septum seals the reservoir in a fluid-tight manner. An outlet is in fluid communication with the reservoir. At least one of the base and cap is formed by metal injection molding. The cap and base may be engaged with a snap fit connection or a rotatable connection. The fluid communication may be along a non-tangential non-radial flow path. The flow path may be asymmetrical and may also include textured walls.Type: GrantFiled: October 6, 2016Date of Patent: October 6, 2020Assignee: Praxis Powder Technology, Inc.Inventors: Eric Houde, Joseph A. Grohowski, Jr.
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Publication number: 20190212090Abstract: A method of forming a firearm suppressor baffle including preparing a titanium alloy powder system, forming of the powder system into a green shape, optionally green machining the green shape, sintering the green shape to create a firearm suppressor baffle formed from sintered material, where the firearm suppressor baffle has an elevated oxygen content of between 0.2 and 0.5 weight percent. The resultant sintered material may have a creep value of less than 1.5% at 50 hours at 450 C. Also, a method of forming a firearm suppressor baffle including preparing a titanium aluminide powder system, forming the titanium aluminide powder system into a green shape through one of compaction and powder metal injection molding, and sintering the green shape to create the firearm suppressor baffle. The titanium aluminide powder method may also include deoxygenating the firearm suppressor baffle. Also disclosed are baffles and suppressors formed using these methods.Type: ApplicationFiled: March 12, 2019Publication date: July 11, 2019Inventors: Jobe Piemme, Joseph A. Grohowski, JR., Paul H. Sheffield
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Patent number: 10254068Abstract: A method of forming a firearm suppressor baffle including preparing a titanium alloy powder system, forming of the powder system into a green shape, optionally green machining the green shape, sintering the green shape to create a firearm suppressor baffle formed from sintered material, where the firearm suppressor baffle has an elevated oxygen content of between 0.2 and 0.5 weight percent. The resultant sintered material may have a creep value of less than 1.5% at 50 hours at 450 C. Also, a method of forming a firearm suppressor baffle including preparing a titanium aluminide powder system, forming the titanium aluminide powder system into a green shape through one of compaction and powder metal injection molding, and sintering the green shape to create the firearm suppressor baffle. The titanium aluminide powder method may also include deoxygenating the firearm suppressor baffle. Also disclosed are baffles and suppressors formed using these methods.Type: GrantFiled: December 7, 2016Date of Patent: April 9, 2019Assignee: Praxis Powder Technology, Inc.Inventors: Jobe Piemme, Joseph A. Grohowski, Jr., Paul H. Sheffield
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Publication number: 20180245187Abstract: A titanium alloy having a Ti—Zr—X—Y formulation, wherein the X component is a Group V or Group VI metal and the Y component is an alpha stabilizer selected from aluminum, tin, silicon, oxygen, carbon, and nitrogen, where the titanium alloy is capable of being blackened in an air, oxygen, or oxygen containing environment. The alloy may have a yield strength of at least 100 ksi. The Y component may be oxygen above 1300 ppm. The Zr content may be greater than 22 weight percent. The alloy may have a lightness index of 46 or less on the CIELAB scale.Type: ApplicationFiled: February 27, 2018Publication date: August 30, 2018Inventors: Paul H. Sheffield, Joseph A. Grohowski, JR.
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Publication number: 20170160035Abstract: A method of forming a firearm suppressor baffle including preparing a titanium alloy powder system, forming of the powder system into a green shape, optionally green machining the green shape, sintering the green shape to create a firearm suppressor baffle formed from sintered material, where the firearm suppressor baffle has an elevated oxygen content of between 0.2 and 0.5 weight percent. The resultant sintered material may have a creep value of less than 1.5% at 50 hours at 450 C. Also, a method of forming a firearm suppressor baffle including preparing a titanium aluminide powder system, forming the titanium aluminide powder system into a green shape through one of compaction and powder metal injection molding, and sintering the green shape to create the firearm suppressor baffle. The titanium aluminide powder method may also include deoxygenating the firearm suppressor baffle. Also disclosed are baffles and suppressors formed using these methods.Type: ApplicationFiled: December 7, 2016Publication date: June 8, 2017Inventors: Jobe Piemme, Joseph A. Grohowski, JR., Paul H. Sheffield
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Publication number: 20170095654Abstract: A vascular access port includes a base with a floor. A cap is engaged with the base to form a reservoir above the floor as a septum seals the reservoir in a fluid-tight manner. An outlet is in fluid communication with the reservoir. At least one of the base and cap is formed by metal injection molding. The cap and base may be engaged with a snap fit connection or a rotatable connection. The fluid communication may be along a non-tangential non-radial flow path. The flow path may be asymmetrical and may also include textured walls.Type: ApplicationFiled: October 6, 2016Publication date: April 6, 2017Inventors: Eric Houde, Joseph A. Grohowski, JR.
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Publication number: 20160296672Abstract: High strength implantable devices having complex surfaces are injection molded from powder metal wherein the surface is defined by a monolithic insert made by additive manufacturing. The insert defines the surface texture of the device and may also include a portion to form an ingrowth texture and a portion to form a substrate interface texture. The tensile bond strength of the texture is 20 Mega Pascal or greater.Type: ApplicationFiled: June 21, 2016Publication date: October 13, 2016Inventor: Joseph A. Grohowski, JR.
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Patent number: 9370609Abstract: High strength implantable devices having complex surfaces are injection molded from powder metal wherein the surface is defined by a monolithic insert made by additive manufacturing. The insert defines the surface texture of the device and may also include a portion to form an ingrowth texture and a portion to form a substrate interface texture. The tensile bond strength of the texture is 20 Mega Pascal or greater.Type: GrantFiled: January 8, 2014Date of Patent: June 21, 2016Assignee: Praxis Powder Technology, Inc.Inventor: Joseph A. Grohowski, Jr.
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Publication number: 20150328685Abstract: In one embodiment, the present invention may be a method of making a porous biocompatible metal article by combining a metal powder with a homogenizing aid to form metal granules, including blending the metal granules and an extractable particulate to form a composite, forming the composite into a green article, removing the extractable particulate from the green article to form a metal matrix and pore structure, and sintering the metal matrix and pore structure. Furthermore the present invention may include a second homogenizing aid combined with the extractable particulate. The present invention also includes shaping the metal matrix and pore structure with or without the use of a binder.Type: ApplicationFiled: July 27, 2015Publication date: November 19, 2015Applicant: Praxis Powder Technology, Inc.Inventor: Joseph A. Grohowski, JR.
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Patent number: 9089431Abstract: In one embodiment, the present invention is a porous article including a porous portion with an average ratio between about 2:1 and about 5:1 of major pore size to minor pore size, having a substantially uniform pore distribution and a porosity of at least 70 percent, the porous article for use as a biological implant. The biological implant can be, for example, an acetabular cup.Type: GrantFiled: June 28, 2013Date of Patent: July 28, 2015Assignee: Praxis Powder Technology, Inc.Inventor: Joseph A. Grohowski, Jr.
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Patent number: 9089427Abstract: In one embodiment, the present invention may be a method of making a porous biocompatible metal article by combining a metal powder with a homogenizing aid to form metal granules, including blending the metal granules and an extractable particulate to form a composite, forming the composite into a green article, removing the extractable particulate from the green article to form a metal matrix and pore structure, and sintering the metal matrix and pore structure. Furthermore the present invention may include a second homogenizing aid combined with the extractable particulate. The present invention also includes shaping the metal matrix and pore structure with or without the use of a binder.Type: GrantFiled: October 11, 2011Date of Patent: July 28, 2015Assignee: Praxis Powder Technology, Inc.Inventor: Joseph A. Grohowski, Jr.
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Publication number: 20140195001Abstract: High strength implantable devices having complex surfaces are injection molded from powder metal wherein the surface is defined by a monolithic insert made by additive manufacturing. The insert defines the surface texture of the device and may also include a portion to form an ingrowth texture and a portion to form a substrate interface texture. The tensile bond strength of the texture is 20 Mega Pascal or greater.Type: ApplicationFiled: January 8, 2014Publication date: July 10, 2014Applicant: Praxis Power Technology, Inc.Inventor: Joseph A. Grohowski, JR.
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Publication number: 20130289735Abstract: In one embodiment, the present invention is a porous article including a porous portion with an average ratio between about 2:1 and about 5:1 of major pore size to minor pore size, having a substantially uniform pore distribution and a porosity of at least 70 percent, the porous article for use as a biological implant. The biological implant can be, for example, an acetabular cup.Type: ApplicationFiled: June 28, 2013Publication date: October 31, 2013Applicant: Praxis Powder Technology, Inc.Inventor: Joseph A. Grohowski, JR.
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Patent number: 8500843Abstract: An article of controlled porosity. The porosity of the article may be controlled by display of a particular pore character with respect to pore size, morphology and distribution through a metal, including a uniform distribution. The uniform distribution of porosity within the metal may be provided by a way of a coated pore former including a homogenizing agent thereat to maintain a uniform distribution of pore former throughout a mixture of the coated pore former and a powdered metal. A metal article may be formed of varying layers of porous metals each formed from an independent mixture of coated pore former and metal as indicated.Type: GrantFiled: June 9, 2006Date of Patent: August 6, 2013Assignee: Praxis Powder Technology, Inc.Inventor: Joseph A. Grohowski
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Publication number: 20120065739Abstract: In one embodiment, the present invention may be a method of making a porous biocompatible metal article by combining a metal powder with a homogenizing aid to form metal granules, including blending the metal granules and an extractable particulate to form a composite, forming the composite into a green article, removing the extractable particulate from the green article to form a metal matrix and pore structure, and sintering the metal matrix and pore structure. Furthermore the present invention may include a second homogenizing aid combined with the extractable particulate. The present invention also includes shaping the metal matrix and pore structure with or without the use of a binder.Type: ApplicationFiled: October 11, 2011Publication date: March 15, 2012Applicant: PRAXIS POWDER TECHNOLOGY, INC.Inventor: Joseph A. Grohowski, JR.
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Publication number: 20100180724Abstract: A porous metal article having a predetermined pore structure. The porosity is provided by the use of an extractable particulate in a powder forming route to create a desired porosity. Extraction of the pore forming particulate prior to sintering of the powder minimizes contamination of the sintered article and allows for the processing of material sensitive to contamination such as titanium. Added functionality can be gained by co-forming the porous material with non-porous material to create an article with layers of differing characteristics. The article is suitable for use as an implant body is porous enough to facilitate tissue in-growth and bony fusion.Type: ApplicationFiled: January 15, 2010Publication date: July 22, 2010Applicant: Praxis Powder Technology, Inc.Inventor: Joseph A. Grohowski, JR.
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Publication number: 20100094426Abstract: A spinal implant of hybrid construction. The implant includes both porous and radiolucent elements. In this manner, the implant allows for substantial fusing of vertebrae while simultaneously allowing for useful follow-on evaluations through imaging. Furthermore, in spite of the potentially differing material character of the porous and radiolucent elements, they may nevertheless be coupled together in an interlocking configuration such that the implant exhibits the behavior of a single unitary device.Type: ApplicationFiled: October 13, 2009Publication date: April 15, 2010Inventors: Joseph A. Grohowski, Jr., Mark Walter, Tracy M. MacNeal