Patents by Inventor Christopher J. Vroman
Christopher J. Vroman 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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Patent number: 7052809Abstract: A gas porous media which comprises a material having a low coefficient of thermal expansion that is capable of retaining 99.99% or more of particles of a size of about 0.003 microns and larger at 0.2 slpm/cm2 while demonstrating a permeability of 3.5×10?12 m2 and a porosity of around 62% is disclosed. The porous media can be fabricated into a frame that is capable of retaining 99.9999999% of particles greater than 0.003 ?m in diameter at 8.3 sccm/cm2 with a permeability of 3.0×10?13 m2 and a porosity of around 53%. The porous medias can be tailored by changing the raw materials and process to yield media with a range of porosities and that exhibit permeability between 1.0E?13 and 1.0E?11 m2. The porous media are used in frames for supporting a pellicle and a reticle in a parallel relationship to each other. The frames may comprise porous media in its entirety or the porous media can be fabricated and sealed into a solid support frame.Type: GrantFiled: October 2, 2003Date of Patent: May 30, 2006Assignee: Mykrolis CorporationInventors: Christopher J. Vroman, Nathan Abbott
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Patent number: 6964693Abstract: A method for forming dendritic metal powders, comprising the steps of: (1) heating a powder comprising non-dendritic particles, under conditions suitable for initial stage sintering, to form a lightly sintered material; and (2) breaking the lightly sintered material to form a powder comprising dendritic particles. In one embodiment, the lightly sintered material is broken by brushing the material through a screen. Another aspect of the present invention comprises the dendritic particles that are produced by the method described above. These particles can comprise any suitable metal, such as transition metals, rare earth metals, main group metals or metalloids or an alloy of two or more such metals. The particles can also comprise a ceramic material, such as a metal oxide. These particles are characterized by a dendritic, highly anisotropic, morphology arising from the fusion of substantially non-dendritic particles, and by a low apparent density relative to the substantially non-dendritic starting material.Type: GrantFiled: March 31, 2003Date of Patent: November 15, 2005Assignee: Mykrolis CorporationInventors: Robert S. Zeller, Christopher J. Vroman
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Patent number: 6770113Abstract: A method for forming dendritic metal powders, comprising the steps of: (1) heating a powder comprising non-dendritic particles, under conditions suitable for initial stage sintering, to form a lightly sintered material; and (2) breaking the lightly sintered material to form a powder comprising dendritic particles. In one embodiment, the lightly sintered material is broken by brushing the material through a screen. Another aspect of the present invention comprises the dendritic particles that are produced by the method described above. These particles can comprise any suitable metal, such as transition metals, rare earth metals, main group metals or metalloids or an alloy of two or more such metals. The particles can also comprise a ceramic material, such as a metal oxide. These particles are characterized by a dendritic, highly anisotropic, morphology arising from the fusion of substantially non-dendritic particles, and by a low apparent density relative to the substantially non-dendritic starting material.Type: GrantFiled: July 27, 2001Date of Patent: August 3, 2004Assignee: Mykrolis CorporationInventors: Robert S. Zeller, Christopher J. Vroman
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Publication number: 20040109153Abstract: The present invention provides a gas porous media, the bulk matrix of which comprises a material having a low coefficient of thermal expansion that is also capable of retaining 99.99% or more of particles of a size of about 0.003 microns and larger at 0.2 slpm/cm2 while demonstrating a permeability of 3.5×10−12 m2 and a porosity of around 62%. The porous media, preferably a membrane, is also fabricated into in such a way that the resultant assembly, in this case a frame, is capable of retaining 99.9999999% of particles greater than 0.003 um in diameter at 8.3 sccm/cm2 with a permeability of 3.0×10−13 m2 and a porosity of around 53%. Both porous medias can be tailored by changing the raw materials and process to yield a range of porosities and exhibit permeability between 1.0E−13 and 1.0E−11 m2.Type: ApplicationFiled: October 2, 2003Publication date: June 10, 2004Inventors: Christopher J. Vroman, Nathan Abbott
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Publication number: 20030200834Abstract: A method for forming dendritic metal powders, comprising the steps of: (1) heating a powder comprising non-dendritic particles, under conditions suitable for initial stage sintering, to form a lightly sintered material; and (2) breaking the lightly sintered material to form a powder comprising dendritic particles. In one embodiment, the lightly sintered material is broken by brushing the material through a screen.Type: ApplicationFiled: March 31, 2003Publication date: October 30, 2003Applicant: Mykrolis CorporationInventors: Robert S. Zeller, Christopher J. Vroman
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Patent number: 6623543Abstract: A method for forming dendritic metal powders, comprising the steps of: (1) heating a powder comprising non-dendritic particles, under conditions suitable for initial stage sintering, to form a lightly sintered material; and (2) breaking the lightly sintered material to form a powder comprising dendritic particles. In one embodiment, the lightly sintered material is broken by brushing the material through a screen. Another aspect of the present invention comprises the dendritic particles that are produced by the method described above. These particles can comprise any suitable metal, such as transition metals, rare earth metals, main group metals or metalloids or an alloy of two or more such metals. The particles can also comprise a ceramic material, such as a metal oxide. These particles are characterized by a dendritic, highly anisotropic, morphology arising from the fusion of substantially non-dendritic particles, and by a low apparent density relative to the substantially non-dendritic starting material.Type: GrantFiled: November 28, 2000Date of Patent: September 23, 2003Assignee: Mykrolis CorporationInventors: Robert S. Zeller, Christopher J. Vroman
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Patent number: 6540809Abstract: A method for forming dendritic metal powders, comprising the steps of: (1) heating a powder comprising non-dendritic particles, under conditions suitable for initial stage sintering, to form a lightly sintered material; and (2) breaking the lightly sintered material to form a powder comprising dendritic particles. In one embodiment, the lightly sintered material is broken by brushing the material through a screen. Another aspect of the present invention comprises the dendritic particles that are produced by the method described above. These particles can comprise any suitable metal, such as transition metals, rare earth metals, main group metals or metalloids or an alloy of two or more such metals. The particles can also comprise a ceramic material, such as a metal oxide. These particles are characterized by a dendritic, highly anisotropic, morphology arising from the fusion of substantially non-dendritic particles, and by a low apparent density relative to the substantially non-dendritic starting material.Type: GrantFiled: November 28, 2000Date of Patent: April 1, 2003Assignee: Mykrolis CorporationInventors: Robert S. Zeller, Christopher J. Vroman
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Publication number: 20010049979Abstract: A method for forming dendritic metal powders, comprising the steps of: (1) heating a powder comprising non-dendritic particles, under conditions suitable for initial stage sintering, to form a lightly sintered material; and (2) breaking the lightly sintered material to form a powder comprising dendritic particles. In one embodiment, the lightly sintered material is broken by brushing the material through a screen.Type: ApplicationFiled: July 27, 2001Publication date: December 13, 2001Applicant: Mykrolis CorporationInventors: Robert S. Zeller, Christopher J. Vroman
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Patent number: 6197085Abstract: A method for forming dendritic metal powders, comprising the steps of: (1) heating a powder comprising non-dendritic particles, under conditions suitable for initial stage sintering, to form a lightly sintered material; and (2) breaking the lightly sintered material to form a powder comprising dendritic particles. In one embodiment, the lightly sintered material is broken by brushing the material through a screen. Another aspect of the present invention comprises the dendritic particles that are produced by the method described above. These particles can comprise any suitable metal, such as transition metals, rare earth metals, main group metals or metalloids or an alloy of two or more such metals. The particles can also comprise a ceramic material, such as a metal oxide. These particles are characterized by a dendritic, highly anisotropic, morphology arising from the fusion of substantially non-dendritic particles, and by a low apparent density relative to the substantially non-dendritic starting material.Type: GrantFiled: October 8, 1998Date of Patent: March 6, 2001Assignee: Millipore CorporationInventors: Robert S. Zeller, Christopher J. Vroman
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Patent number: 6193778Abstract: A method for forming dendritic metal powders, comprising the steps of: (1) heating a powder comprising non-dendritic particles, under conditions suitable for initial stage sintering, to form a lightly sintered material; and (2) breaking the lightly sintered material to form a powder comprising dendritic particles. In one embodiment, the lightly sintered material is broken by brushing the material through a screen. Another aspect of the present invention comprises the dendritic particles that are produced by the method described above. These particles can comprise any suitable metal, such as transition metals, rare earth metals, main group metals or metalloids or an alloy of two or more such metals. The particles can also comprise a ceramic material, such as a metal oxide. These particles are characterized by a dendritic, highly anisotropic, morphology arising from the fusion of substantially non-dendritic particles, and by a low apparent density relative to the substantially non-dendritic starting material.Type: GrantFiled: October 8, 1998Date of Patent: February 27, 2001Assignee: Millipore CorporationInventors: Robert S. Zeller, Christopher J. Vroman
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Patent number: 5814272Abstract: A method for forming dendritic metal powders, comprising the steps of: (1) heating a powder comprising non-dendritic particles, under conditions suitable for initial stage sintering, to form a lightly sintered material; and (2) breaking the lightly sintered material to form a powder comprising dendritic particles. In one embodiment, the lightly sintered material is broken by brushing the material through a screen. Another aspect of the present invention comprises the dendritic particles that are produced by the method described above. These particles can comprise any suitable metal, such as transition metals, rare earth metals, main group metals or metalloids or an alloy of two or more such metals. The particles can also comprise a ceramic material, such as a metal oxide. These particles are characterized by a dendritic, highly anisotropic, morphology arising from the fusion of substantially non-dendritic particles, and by a low apparent density relative to the substantially non-dendritic starting material.Type: GrantFiled: February 21, 1996Date of Patent: September 29, 1998Assignee: Millipore CorporationInventors: Robert S. Zeller, Christopher J. Vroman