Patents by Inventor Vedagiri Velpari
Vedagiri Velpari 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: 8728217Abstract: In some embodiments, the present invention provide filtration media for the treatment of flue gas streams and methods of making and using the same. In one embodiment, a filtration medium comprises a pollutant absorbent layer comprising a plurality of activated carbon fibers, at least one woven fabric, and at least one non-woven fabric, wherein the pollutant absorbent layer is positioned between the at least one woven fabric and the at least one non-woven fabric.Type: GrantFiled: July 14, 2011Date of Patent: May 20, 2014Assignee: PPG Industries Ohio, Inc.Inventors: Vedagiri Velpari, Jian Meng, Dennis Gilmore, Timothy E. Marsh, James Watson, Stuart Hellring, Paul A. Westbrook
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Patent number: 8721777Abstract: In some embodiments, the present invention provides filtration media for the treatment of flue gas streams and methods of making and using the same. In one embodiment, a filtration medium comprises a pollutant absorbent layer comprising a plurality of activated carbon fibers, a first woven fabric, and a second woven fabric, wherein the pollutant absorbent layer is positioned between the first woven fabric and the second woven fabric.Type: GrantFiled: August 26, 2011Date of Patent: May 13, 2014Assignee: PPG Industries Ohio, Inc.Inventors: Vedagiri Velpari, Jian Meng, Paul A. Westbrook, Timothy E. Marsh, Steven Joel Parks
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Publication number: 20120067220Abstract: In some embodiments, the present invention provides filtration media for the treatment of flue gas streams and methods of making and using the same. In one embodiment, a filtration medium comprises a pollutant absorbent layer comprising a plurality of activated carbon fibers, a first woven fabric, and a second woven fabric, wherein the pollutant absorbent layer is positioned between the first woven fabric and the second woven fabric.Type: ApplicationFiled: August 26, 2011Publication date: March 22, 2012Inventors: Vedagiri Velpari, Jian Meng, Paul A. Westbrook, Timothy E. Marsh, Steven Joel Parks
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Publication number: 20120017763Abstract: In some embodiments, the present invention provide filtration media for the treatment of flue gas streams and methods of making and using the same. In one embodiment, a filtration medium comprises a pollutant absorbent layer comprising a plurality of activated carbon fibers, at least one woven fabric, and at least one non-woven fabric, wherein the pollutant absorbent layer is positioned between the at least one woven fabric and the at least one non-woven fabric.Type: ApplicationFiled: July 14, 2011Publication date: January 26, 2012Inventors: Vedagiri Velpari, Jian Meng, Dennis Gilmore, Timothy E. Marsh, James Watson, Stuart Hellring, Paul A. Westbrook
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Patent number: 6949289Abstract: The present invention provides an at least partially coated fiber strand comprising a plurality of glass fibers having a coating composition on at least a portion of at least one of the glass fibers, the coating composition comprising at least one coating comprising greater than 20 weight percent on a total solids basis of a plurality of particles selected from inorganic particles, organic hollow particles, composite particles, and mixtures of any of the foregoing, wherein the plurality of particles have a Mohs' hardness value which does not exceed the Mohs' hardness value of the glass fibers.Type: GrantFiled: November 3, 2000Date of Patent: September 27, 2005Assignee: PPG Industries ohio, Inc.Inventors: Ernest L. Lawton, Vedagiri Velpari, William B. Rice, Walter J. Robertson, Bruce E. Novich, Xiang Wu, Kami Lammon-Hilinski
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Patent number: 6809046Abstract: The present invention provides non-heat cleaned glass fiber fabrics comprising resin compatible coatings that offer higher tensile strengths than corresponding fabrics that have been heat cleaned and silane finished. These fabrics can be used in a wide variety of applications, such as reinforcements for composites such as printed circuit boards. In one nonlimiting embodiment, the invention provides a non-heat cleaned fabric comprising a plurality of fiber strands in a warp direction and a fill direction, each fiber strand comprising a plurality of E-glass fiber, and having a resin compatible coating composition on at least a portion of a surface of at least one fiber strand, wherein the fabric has a tensile strength of at least 267 Newtons when measured in the warp direction or fill direction. Although not required, the fabric also has a tensile strength of at least 1.5 times that of a corresponding fabric that is heat cleaned by heating the corresponding fabric to a temperature of at least 380° C.Type: GrantFiled: February 28, 2001Date of Patent: October 26, 2004Assignee: PPG Industries Ohio, Inc.Inventors: Vedagiri Velpari, Ernest L. Lawton, William B. Rice, Walter J. Robertson, Kami Lammon-Hilinski, Bruce E. Novich, Xiang Wu
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Patent number: 6593255Abstract: A fabric comprising at least one fiber strand comprising a plurality of fibers and having a resin compatible coating composition on at least a surface of the at least one fiber strand, wherein the at least one fiber strand has an Air Jet Transport Drag Force value of greater than 100,000 gram force per gram mass of strand as determined by a needle air jet nozzle unit having an internal air jet chamber having a diameter of 2 millimeters and a nozzle exit tube having a length of 20 centimeters at a strand feed rate of 274 meters per minute and an air pressure of 310 kiloPascals.Type: GrantFiled: November 3, 2000Date of Patent: July 15, 2003Assignee: PPG Industries Ohio, Inc.Inventors: Ernest L. Lawton, Vedagiri Velpari, William B. Rice, Walter J. Robertson, Bruce E. Novich, Xiang Wu, Kami Lammon-Hilinski
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Patent number: 6582511Abstract: The present invention provides concrete having improved plastic shrinkage crack resistance, comprising: concrete; and non-alkaline resistant glass fibers. The present invention also provides a method of reducing plastic shrinkage cracks in concrete, comprising the steps of: combining cement, aggregate, sand, and water to form concrete; adding a desired amount of non-alkaline resistant glass fibers to the concrete; and mixing the concrete and glass fibers to disperse the glass fibers uniformly throughout the concrete, wherein the glass fibers reduce the amount of plastic shrinkage cracks of the concrete as compared to non-fiber reinforced concrete.Type: GrantFiled: November 26, 2001Date of Patent: June 24, 2003Assignee: PPG Industries Ohio, Inc.Inventor: Vedagiri Velpari
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Publication number: 20020193027Abstract: The present invention provides a fabric comprising fiber strands having a coating that is more soluble in a resin matrix material than conventional slashing and/or silane finishes. As a result, the coating does not have to be removed prior to combining the coated fiber strand with a resin matrix material. These fabrics can be used in a wide variety of applications, such as reinforcements for composites, such as printed circuit boards.Type: ApplicationFiled: February 28, 2001Publication date: December 19, 2002Inventors: David E. Dana, Vedagiri Velpari, Kami Lammon-Hilinski, Ernest L. Lawton, Bruce E. Novich, William B. Rice, Walter J. Robertson, Xiang Wu
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Publication number: 20020123285Abstract: The present invention provides an electronic support comprising: (A) at least one woven fiber reinforcement material formed from at least one fiber free of basalt glass; and (B) at least one matrix material in contact with at least a portion of the at least one reinforcement material, the at least one matrix material comprising at least one non-fluorinated polymer and at least one inorganic filler, wherein the at least one inorganic filler comprises at least one non-hydratable, lamellar inorganic solid lubricant having a high electrical resistivity and wherein the at least one inorganic filler comprises at least 6 weight percent of a total combined weight of the at least one inorganic filler and the at least one matrix material on a total solids basis.Type: ApplicationFiled: February 15, 2001Publication date: September 5, 2002Inventors: David E. Dana, Vedagiri Velpari, Langqiu Xu, Charles Kahle, Bruce Novich
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Patent number: 6419981Abstract: Methods for inhibiting abrasive wear of a fiber strand comprising at least one glass fiber by sliding contact with surface asperities of a solid object, comprising (a) applying a composition to at least a portion of a surface of at least one glass fiber of a glass fiber strand; (b) at least partially drying the composition to form a sized glass fiber strand having a residue of the composition upon at least a portion of the surface of the at least one class fiber; and (c) sliding at least a portion of the glass fiber strand to contact surface asperities of a solid object, the surface asperities having a hardness value which is greater than a hardness value of the at least one glass fiber, such that abrasive wear of the at least one glass fiber of the glass fiber strand by contact with the surface asperities of the solid object is inhibited by the inorganic solid lubricant particles.Type: GrantFiled: July 20, 2000Date of Patent: July 16, 2002Assignee: PPG Industries Ohio, Inc.Inventors: Bruce E. Novich, Kami Lammon-Hilinski, Walter J. Robertson, Xiang Wu, Vedagiri Velpari, Ernest L. Lawton, William B. Rice
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Publication number: 20020085888Abstract: The present invention provides a method of forming an aperture in an electronic support, comprising: (A) positioning an electronic support in registry with an aperture forming device; and (B) forming an aperture at least partially through the electronic support with the aperture forming device while dispensing a fluid stream comprising at least one solid lubricant, proximate the aperture forming device during at least a position of the forming, such that the at least one solid lubricant contacts at least a portion of an interface between the aperture forming device and the electronic support.Type: ApplicationFiled: February 15, 2001Publication date: July 4, 2002Inventors: Vedagiri Velpari, Charles B. Greenberg, Bruce E. Novich
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Publication number: 20020086598Abstract: Prepregs for an electronic support comprising: (a) a matrix material; and (b) at least one non-degreased fabric comprising at least one strand comprising a plurality of fibers, wherein at least a portion of the fabric comprises a coating which is compatible with the matrix material, and wherein the at least one strand has a shape factor of greater than 1, measured in the warp direction or the fill direction of the at least one non-degreased fabric. Laminates for an electronic support comprising: (a) a matrix material; and (b) at least one non-degreased fabric comprising at least one strand comprising a plurality of fibers, wherein at least a portion of the fabric comprises a coating which is compatible with the matrix material, and wherein the at least one strand has a shape factor of greater than 1, measured in the warp direction or the fill direction of the at least one non-degreased fabric. Electronic supports and electronic circuit boards comprising at least one prepreg or at least one laminate.Type: ApplicationFiled: February 28, 2001Publication date: July 4, 2002Inventors: Vedagiri Velpari, Kami Lammon-Hilinski, Ernest L. Lawton, Bruce E. Novich, William B. Rice, Walter J. Robertson, Xiang Wu
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Publication number: 20020058449Abstract: At least partially clad laminates comprising: (a) a cladding material; (b) a matrix material; and (c) at least one non-degreased fabric comprising at least one strand comprising a plurality of fibers, wherein at least a portion of the at least one non-degreased fabric comprises a coating which is compatible with the matrix material, and wherein at least a portion of the at least partially clad laminate has a roughness factor less than 8 microns using a one ounce clad, measured in either the warp direction or the fill direction of the at least one non-degreased. Electronic supports and electronic circuit boards comprising at least one at least partially clad laminate.Type: ApplicationFiled: February 28, 2001Publication date: May 16, 2002Inventors: Vedagiri Velpari, Kami Lammon-Hilinski, Ernest L. Lawton, Bruce E. Novich, William B. Rice, Walter J. Robertson, Xiang Wu
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Publication number: 20020058140Abstract: The present invention provides an at least partially coated fiber strand comprising a plurality of fibers having a resin compatible coating composition on at least a portion of a surface of at least one of the fibers, the resin compatible coating composition comprising: (a) a plurality of discrete particles comprising a silicate having a high affinity for metal ions; and (b) at least one film-forming material.Type: ApplicationFiled: February 15, 2001Publication date: May 16, 2002Inventors: David E. Dana, Langqiu Xu, Ernest Lawton, Vedagiri Velpari, Walter Robertson, William B. Rice, Kami Lammon-Hilinski, Xiang Wu, Bruce Novich
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Publication number: 20020055313Abstract: The present invention provides non-heat cleaned glass fiber fabrics comprising resin compatible coatings that offer higher tensile strengths than corresponding fabrics that have been heat cleaned and silane finished. These fabrics can be used in a wide variety of applications, such as reinforcements for composites such as printed circuit boards.Type: ApplicationFiled: February 28, 2001Publication date: May 9, 2002Inventors: Vedagiri Velpari, Ernest L. Lawton, William B. Rice, Walter J. Robertson, Kami Lammon-Hilinski, Bruce E. Novich, Xiang Wu